CreateUserWizard and email validation

 Hi,
I can't get the Email field to validate, making sure it's in proper format, using the CreateUserWizard.  So far it looks like this:
<asp:CreateUserWizard ID="CreateUserWizard1" runat="server" LoginCreatedUser="False">
<WizardSteps>
   <asp:CreateUserWizardStep ID="CreateUserWizardStep1" runat="server">
       <ContentTemplate>
...
                                        <tr>
                                         ...