Validations controls inside this section never worked!!! see Member_Register.aspx. Why??? 

<asp:WizardStep ID="WizardStep1" runat="server" Title="Contact details">
       <table>
        <tr>
         <td class="formlabel">
          <label for="fname">
           First Name:</label>
         </td>
         <td class="formvalue">
          <asp:TextBox runat="server" ID="fname" CssClass="txtfield" />
          <asp:RequiredFieldValidator ControlToValidate="fname" ErrorMessage="First Name is required."
           ID="RequiredFieldValidator1" runat="server" ToolTip="First Name is required."
           ValidationGroup="CreateUserForm">*</asp:RequiredFieldValidator>
         </td>
        </tr>
        <tr>
         <td class="formlabel">
          <label for="lname">
           Last Name:</label>
         </td>
         <td class="formvalue">
          <asp:TextBox runat="server" ID="lname" CssClass="txtfield" />
          <asp:RequiredFieldValidator ControlToValidate="lname" ErrorMessage="Last Name is required."
           ID="RequiredFieldValidator2" runat="server" ToolTip="Last Name is required."
           ValidationGroup="CreateUserForm">*</asp:RequiredFieldValidator>
         </td>
        </tr>
        <tr>
         <td class="formlabel">
          <label for="Addr">
           Address:</label>
         </td>
         <td class="formvalue">
          <asp:TextBox runat="server" ID="Addr" Rows="3" TextMode="MultiLine" CssClass="txtblock" />
         </td>
        </tr>
        <tr>
         <td class="formlabel">
          <label for="Phone">
           Phone:</label>
         </td>
         <td class="formvalue">
          <asp:TextBox runat="server" ID="Phone" CssClass="txtfield" />
         </td>
        </tr>
       </table>
      </asp:WizardStep>

Well it seems that nobody knows or cares enough to answer this question, sorry I have not had any time to do anything on my end either so this is just going to be a nuissance issue for a while.

 I've been looking at this and it seems that if you set your validation group to be the name of your CreateUserWizard control, your validator will be used when the reigster button is clicked.

 I hope this is of some use,

Rob.

E.g:

       <asp:CreateUserWizard ID="RegisterUser" runat="server" >
        
            <WizardSteps>
                <asp:CreateUserWizardStep ID="CUWStep1" runat="server">
                    <ContentTemplate>
                        // Normal login stuff ripped out.
                        Business Focus:
                        <asp:DropDownList ID="ddlBusinessFocus" runat="server" >
                            <asp:ListItem Value="0" Text="" Selected="True" />
                            <asp:ListItem Text="Hedge Fund" />
                        </asp:DropDownList>
                        <asp:RequiredFieldValidator id="ddlBusinessFocusValidator"  
                            runat="server" ErrorMessage="Please make a selection"
                            ControlToValidate="ddlBusinessFocus"
                            InitialValue="0" ValidationGroup="RegisterUser"/> <br />
                    </ContentTemplate>
                </asp:CreateUserWizardStep>
                <asp:CompleteWizardStep ID="CompleteWizardStep1" runat="server">
                </asp:CompleteWizardStep>
            </WizardSteps>
        </asp:CreateUserWizard>