having problems with with custom controls in CreateUserWizard

im using framework 3.5
asp.net.

Here is the whole of my create user wizard at the moment


<asp:CreateUserWizard ID="RegisterUser" runat="server" CancelDestinationPageUrl="~/Guest_Home.aspx" ContinueDestinationPageUrl="~/Member/Manage_Profile.aspx" oncreatinguser="RegisterUser_CreatingUser" CellPadding="10" CellSpacing="10" Height="250px" Width="310px" CreateUserButtonImageUrl="~/images/iaccept.jpg" CreateUserButtonText="" oncreateduser="RegisterUser_CreatedUser" CreateUserButtonType="Image" DisableCreatedUser="True" MailDefinition-BodyFileName="~/EmailTemplates/CreateUserWizard.txt" MailDefinition-Subject="Welcome to Message2You! Please activate your account." onsendingmail="RegisterUser_SendingMail& ...