Customer Registration Customization

hi,

I want to add some extra fields into the customer registration as user attributes, how can i do that

i've added into the CreateUserWizardStep and also changed the codebehind like follow


TextBox txt1 = (TextBox)CreateUserWizardStep1.ContentTemplateContainer.FindControl("txt1");            TextBox txt2 = (TextBox)CreateUserWizardStep1.ContentTemplateContainer.FindControl("txt2");customer.option1 = txt1.Text;            customer.option2 = txt2.Text;

and i've also added custom properties into the customer.cs file

but still faild to save into the customerAttributes table