I keep on getting an error when trying to delete a record in a gridview that is bound to an entitydatasource. The error I get is:

Error while setting property 'Amount': '$120.00 is not a valid value for Decimal.'.

Can someone please help? Below is my markup

DataSourceID="dsEmployeePersonalExpenses" PageSize="5">

<Columns>

<asp:TemplateField>

<ItemTemplate>

<asp:LinkButton ID="DeleteLinkButton" runat="server" CommandName="Delete" CausesValidation="false" Text="Delete" OnClientClick='if(confirm("Are you sure you want to delete this expense?")==false){event.returnValue=false;return false;}else{return true;}' />

</ItemTemplate>

</asp:TemplateField>

<asp:CommandField ShowSelectButton="True" SelectText="Edit" />

SortExpression="Amount" />

SortExpression="Date" DataFormatString="{0:d}" />

SortExpression="Description" />

</Columns>

<EmptyDataTemplate>

<h1>You currently do not have any personal expenses recorded.<br />

Use the form to the right to create a personal expense</h1>

</EmptyDataTemplate>

</asp:GridView>

ContextTypeName="MYCONTEXTTYPENAMEHE"

EntitySetName="EmployeePersonalExpenseSet" Where="it.Employee.EmployeeId = @employeeId">

<WhereParameters>

<asp:Parameter Name="employeeId" Type="Int32" />

</WhereParameters>

</asp:EntityDataSource>