Remove email field from createUserWizard

Hi

I am using  createUserWizard. In that I dont want email. I want to remove it.

I have set  RequireEmail="False" of CreateUserWizard1 and completely removed email textbox,label and its validator.

But still when I click on create user ,
It gives message
Please enter a valid e-mail address.

Plz help.

 
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