Security :: Create User Wizard Error Won't Send Confirmation Email?

I have create user wizard control on my page as below with mail definition setup to send a welcome email to new registerd user.

<asp:CreateUserWizard ID="CreateUserWizard1" runat="server"
requiresQuestionAndAnswer= "false"
oncreateduser="CreateUserWizard1_CreatedUser" LoginCreatedUser="False">
<MailDefinition BodyFileName="~/EmailTemplates/CreateUserWizard.txt"
From="myemailaddress" Subject="New User">
</MailDefinition>
<WizardSteps>
<asp:CreateUserWizardStep ID="CreateUserWizardStep1" runat="server" >
<ContentTemplate>
layout content here
</
ContentTemplate>
</WizardSteps
>
</asp:CreateUserWizard
>
Problem is I am not receiving the welcome email.
To test it, I placed another create user wizard on another page in its default form
as below
<asp:CreateUserWizard ID="CreateUserWizard1" runat="server">
<MailDefinition BodyFileName="~/EmailTemplates/CreateUserWizard.txt"
From="myemailaddress" Subject="New User">
</MailDefinition>
<WizardSteps>
<asp:CreateUserWizardStep runat="server" />
<asp:CompleteWizardStep runat="server" />
</WizardSteps>
</asp:CreateUserWizard>

This one worked and I got welcome email. The setup in Web Config is correct. Is it because I have the oncreateduser="CreateUserWizard1_CreatedUser" or some other conflict issue.