i have a signup page that runs with a masterpage and the page worked fine before i started adding validation controls and then it just stopped working .. i;m including both the content and code-behind pages. the Submit and clear buttons stopped working

Content Page

<%@ Page Language="VB" MasterPageFile="~/InfoSiteMasterPage.master" AutoEventWireup="false" CodeFile="signup.aspx.vb" Inherits="Signup" %>


<asp:Content runat="server" ID="SignupHeaderDefault" ContentPlaceHolderId="CPHHeaderTitleLeft">
    <asp:Label runat="server" ID="TopLeftHeaderText" Text= "Please fill in the form completely" />
</asp:Content>

<asp:Content ID="Content1" runat="server" contentplaceholderid="CPHHead">
        <title>O.C.D.I.A. One Call Does It All</title>
</asp:Content>

<asp:Content runat="server" ID="MainContent" ContentPlaceHolderId="CPHdbContent">
    <div style="margin: 0px auto; width:700px" class="divcenter">Please complete the form and click the submit button. You will need to await an email with your temporary password from us before you can log in and enjoy our Member Services
	</div>
    <table  class="center" width="800px" cellpadding="0" cellspacing="0" >
        <tr>
            <td width="180px">&nbsp</td>
            <td width="5px">&nbsp</td>
            <td align="left" style="width:600px">&nbsp</td>
        </tr>
        <tr>
            <td></td>
            <td></td>
            <td align="left">
                <asp:Label id="lblOutput"  runat="server" Enabled ="false" />
            </td>
        </tr>
        <tr>
            <td align="right">
                <asp:Label ID="lblFName" runat="server" Font-Bold="true" Text= "First Name" Enabled="true"></asp:Label>
            </td>
            <td></td>
            <td align="left">
                <asp:TextBox ID="txtFname" runat="server" BackColor="#CCAAEE"></asp:TextBox>
                    <asp:RequiredFieldValidator id="FnameRequiredFieldValidator" runat="server" ForeColor="Purple"
                        ControlToValidate="txtFname" CssClass="universalbutton" SetFocusOnError="True"
                        ErrorMessage=" *You need to enter your First name! " >
                    </asp:RequiredFieldValidator>
            </td>
        </tr>
        <tr>
            <td align="right">
                <asp:Label ID="lblLName" runat="server" Font-Bold="true" Text= "Last Name" Enabled="true"></asp:Label>
            </td>
            <td></td>
            <td align="left">
                <asp:TextBox ID="txtLname" runat="server" BackColor="#CCAAEE"></asp:TextBox>
                    <asp:RequiredFieldValidator id="LnameRequiredFieldValidator" runat="server" ForeColor="Purple"
                        ControlToValidate="txtLname" CssClass="universalbutton" SetFocusOnError="True" >
                            &nbsp *You will need to enter your Last name! &nbsp
                    </asp:RequiredFieldValidator>
            </td>
        </tr>
        <tr>
            <td align="right">
                <asp:Label ID="lblUnit" runat="server" Font-Bold="true" Text= "Unit #" Enabled="true"></asp:Label>
            </td>
            <td></td>
            <td align="left">
                <asp:TextBox ID="txtUnit" runat="server" BackColor="#CCAAEE"></asp:TextBox>
            </td>
        </tr>
        <tr>
            <td align="right">
                <asp:Label ID="lblStNum" runat="server" Font-Bold="true" Text= "Street  #" Enabled="true"></asp:Label>
            </td>
            <td></td>
            <td align="left">
                <asp:TextBox ID="txtStNumb" runat="server" BackColor="#CCAAEE"></asp:TextBox>
                    <asp:RangeValidator runat="server" ID="StNumRangeValidator" ControlToValidate="txtStNumb" Type="Integer"
                        MinimumValue="1" MaximumValue="99999" SetFocusOnError="True" CssClass="universalbutton"
                        Display="Dynamic" ErrorMessage="Please only use numbers from 0-9" >
                    </asp:RangeValidator>
                    <asp:RequiredFieldValidator id="RequiredFieldValidator1" runat="server" ForeColor="Purple" CssClass="universalbutton"
                        ControlToValidate="txtStNumb" SetFocusOnError="True"
                        ErrorMessage=" *You need to enter your address! ">
                    </asp:RequiredFieldValidator>
            </td>
        </tr>
        <tr>
            <td align="right">
                <asp:Label ID="lblStName" runat="server" Font-Bold="true" Text= "Street Name" Enabled="true"></asp:Label>
            </td>
            <td></td>
            <td align="left">
                <asp:TextBox ID="txtStName" runat="server" BackColor="#CCAAEE"></asp:TextBox>
            </td>
        </tr>
        <tr>
            <td align="right">
                <asp:Label ID="lblStType" runat="server" Font-Bold="true" Text= "Street Type" Enabled="true"></asp:Label>
            </td>
            <td></td>
            <td align="left">
                <asp:TextBox ID="txtStType" runat="server" BackColor="#CCAAEE"></asp:TextBox>
            </td>
        </tr>
        <tr>
            <td align="right">
                <asp:Label ID="lblCity" runat="server" Font-Bold="true" Text= "City" Enabled="true"></asp:Label>
            </td>
            <td></td>
            <td align="left">
                <asp:TextBox ID="txtCity" runat="server" BackColor="#CCAAEE"></asp:TextBox>
            </td>
        </tr>
        <tr>
            <td align="right">
                <asp:Label ID="lblProv" runat="server" Font-Bold="true" Text="Province" Enabled="true"></asp:Label>
            </td>
            <td></td>
            <td align="left">
                <asp:TextBox ID="txtProv" runat="server" BackColor="#CCAAEE">Ontario</asp:TextBox>
            </td>
        </tr>
        <tr>
            <td align="right">
                <asp:Label ID="lblCountry" runat="server" Font-Bold="true" Text= "Country" Enabled="true"></asp:Label>
            </td>
            <td></td>
            <td align="left">
                <asp:TextBox ID="txtCountry" runat="server" BackColor="#CCAAEE" Text="Canada">Canada</asp:TextBox>
            </td>
        </tr>
        <tr>
            <td align="right">
                <asp:Label ID="lblPostal" runat="server" Font-Bold="true" Text= "Postal Code" Enabled="true"></asp:Label>
            </td>
            <td></td>
            <td align="left">
                <asp:TextBox ID="txtPostal" runat="server" BackColor="#CCAAEE"></asp:TextBox>
            </td>
        </tr>
        <tr>
            <td align="right">
                <asp:Label ID="lblHomePh" runat="server" Font-Bold="true" Text= "Home Phone #" Enabled="true"></asp:Label>
            </td>
            <td></td>
            <td align="left" >
                <asp:TextBox ID="txtHomePh" runat="server" BackColor="#CCAAEE">905-</asp:TextBox>
            </td>
        </tr>
        <tr>
            <td align="right">
                <asp:Label ID="lblCell" runat="server" Font-Bold="true" Text="Cell Phone #" Enabled="true" ></asp:Label>
            </td>
            <td></td>
            <td align="left" >
                <asp:TextBox ID="txtCell" runat="server" BackColor="#CCAAEE">905-</asp:TextBox>
            </td>
        </tr>
        <tr>
            <td align="right">
                <asp:Label ID="lblEmail" runat="server" Font-Bold="true" Text= "Email" Enabled="true"></asp:Label>
            </td>
            <td></td>
            <td align="left" >
                <asp:TextBox ID="txtEmail" runat="server" BackColor="#CCAAEE"></asp:TextBox>
                    <asp:RegularExpressionValidator ID="EmailValidator" runat="server" ControlToValidate="txtEmail">
                    </asp:RegularExpressionValidator>
                    <asp:RequiredFieldValidator id="RequiredFieldValidator2" runat="server" ForeColor="Purple" CssClass="universalbutton"
                        ControlToValidate="txtEmail" SetFocusOnError="True" ErrorMessage=" *You need to enter a valid email address! " >
                    </asp:RequiredFieldValidator>
            </td>
        </tr>
        <tr>
            <td align="right">
                <asp:Label ID="lblComment" runat="server" Font-Bold="true" Text= "Comments" Enabled="true"></asp:Label>
            </td>
            <td></td>
            <td align="left">
                <asp:TextBox ID="txtComment" runat="server" BackColor="#CCAAEE" Height="90px" TextMode="MultiLine" Width="320px"></asp:TextBox>
            </td>
        </tr>
        <tr>
            <td colspan="3"></td>
        </tr>
        <tr>
            <td></td>
            <td></td>
            <td align="left" >
                <asp:Button ID="SubmitButton" runat="server" CssClass="widerButtonStyle"
                    Text="Submit" onclick="SubClear_Button_Click" />&nbsp;&nbsp;&nbsp;
		        <asp:Button ID="ClearButton" onclick="SubClear_Button_Click" CausesValidation="false"
			        runat="server" Text="Clear" CssClass="widerButtonStyle" />
            </td>
        </tr>
        <tr>
            <td>&nbsp;</td>
            <td>&nbsp;</td>
            <td>&nbsp;</td>
        </tr>
    </table>
</asp:Content>

code-behind page

Imports System.Data.SqlClient
Imports System.Web.Configuration
Imports System.Data

Public Class Signup
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        If IsPostBack Then
            lblOutput.Enabled = True
            lblOutput.Text = "* All fields have been cleared"
        Else
            lblOutput.Enabled = False
            lblOutput.Text = ""
        End If

    End Sub


    Protected Sub SubClear_Button_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles SubmitButton.Click

        If sender.ID = "ClearButton" Then
            txtFname.Text = ""
            txtLname.Text = ""
            txtUnit.Text = ""
            txtStNumb.Text = "0"
            txtStName.Text = ""
            txtStType.Text = ""
            txtCity.Text = ""
            txtProv.Text = "Ontario"
            txtCountry.Text = "Canada"
            txtPostal.Text = ""
            txtHomePh.Text = "905-"
            txtCell.Text = ""
            txtEmail.Text = ""
            txtComment.Text = ""
            lblOutput.Enabled = True
            lblOutput.Text = "* All fields have been cleared"
        End If

        If sender.ID = "SubmitButton" Then
            Dim strSQLQuery As String
            Dim objConnection As SqlConnection
            Dim objCommand As SqlCommand


            objConnection = New SqlConnection(WebConfigurationManager.ConnectionStrings("ocdiaCustSignupConnectionString").ToString())

            ' Our insert command
            strSQLQuery = "INSERT INTO user_signup " _
             & "(firstname, lastname, unitnumber, streetnumber, " _
             & "streetname, streettype, city, province, country, postal, " _
             & "homephone, cellphone, comments, email ) " _
             & "VALUES (@fName, @lName,  @unit, " _
             & "@stnumb, @stname, @sttype, @city1, @prov1, @count1, @Postal, " _
             & "@home, @cell, @comment, @email )"

            ' Create new command object passing it our SQL insert
            ' and telling it which connection to use.
            objCommand = New SqlCommand(strSQLQuery, objConnection)

            ' Add parameters that our SQL command takes:
            objCommand.Parameters.Add(New SqlParameter("@fName", SqlDbType.VarChar, 50))
            objCommand.Parameters.Add(New SqlParameter("@lName", SqlDbType.VarChar, 50))
            objCommand.Parameters.Add(New SqlParameter("@unit", SqlDbType.VarChar, 15))
            objCommand.Parameters.Add(New SqlParameter("@stnumb", SqlDbType.VarChar, 6))
            objCommand.Parameters.Add(New SqlParameter("@stname", SqlDbType.VarChar, 6))
            objCommand.Parameters.Add(New SqlParameter("@sttype", SqlDbType.VarChar, 20))
            objCommand.Parameters.Add(New SqlParameter("@city1", SqlDbType.VarChar, 30))
            objCommand.Parameters.Add(New SqlParameter("@prov1", SqlDbType.VarChar, 30))
            objCommand.Parameters.Add(New SqlParameter("@count1", SqlDbType.VarChar, 20))
            objCommand.Parameters.Add(New SqlParameter("@Postal", SqlDbType.VarChar, 9))
            objCommand.Parameters.Add(New SqlParameter("@home", SqlDbType.VarChar, 20))
            objCommand.Parameters.Add(New SqlParameter("@cell", SqlDbType.VarChar, 20))
            objCommand.Parameters.Add(New SqlParameter("@comment", SqlDbType.VarChar, 800))
            objCommand.Parameters.Add(New SqlParameter("@email", SqlDbType.VarChar, 100))

            ' Set the values of these parameters:
            objCommand.Parameters("@fName").Value = Server.HtmlEncode(txtFname.Text)
            objCommand.Parameters("@lName").Value = Server.HtmlEncode(txtLname.Text)
            objCommand.Parameters("@unit").Value = Server.HtmlEncode(txtUnit.Text)
            objCommand.Parameters("@stnumb").Value = Server.HtmlEncode(txtUnit.Text)
            objCommand.Parameters("@stname").Value = Server.HtmlEncode(txtStName.Text)
            objCommand.Parameters("@sttype").Value = Server.HtmlEncode(txtStType.Text)
            objCommand.Parameters("@city1").Value = Server.HtmlEncode(txtCity.Text)
            objCommand.Parameters("@prov1").Value = Server.HtmlEncode(txtProv.Text)
            objCommand.Parameters("@count1").Value = Server.HtmlEncode(txtCountry.Text)
            objCommand.Parameters("@Postal").Value = Server.HtmlEncode(txtPostal.Text)
            objCommand.Parameters("@home").Value = Server.HtmlEncode(txtHomePh.Text)
            objCommand.Parameters("@cell").Value = Server.HtmlEncode(txtCell.Text)
            objCommand.Parameters("@comment").Value = Server.HtmlEncode(txtComment.Text)
            objCommand.Parameters("@email").Value = Server.HtmlEncode(txtEmail.Text)

            ' Open the connection, execute the command, and close the connection.

            objConnection.Open()
            objCommand.ExecuteNonQuery()
            objCommand.Dispose()
            Response.Redirect("signupcomp.aspx")

            ' Record is now added...
        End If

    End Sub


End Class