Clearing all textboxes on CreateUserWizard control in ASP.NET 2.0

[asumal]

Hello

I am new to ASP.NET. I am using CreateUserWizard control to register & create a user. I am using Membership API. I have a Cancel button on the CreateUserWizard step 2 alongwith Create User button & Previous button. Actually, i have added some more textboxes on the default control for taking user's personal information. The problem is that when i call the below mentioned code all textboxes for user's personal information gets cleared but not the default controls on the CreateUserWizard control which takes user's login ,Security question & answer information. My code is as follows:

protected void CreateUserWizard2_CancelButtonClick(object sender, EventArgs e)
{//Calling a function & passing all the createuserwizard controls
DisplayControl(CreateUserWizard2.CreateUserStep.Co ntentTemplateContainer.Controls);
fstname.Focus();
}

private void DisplayControl(ControlCollection Controls)
{ //recusive routine that can go through the entire control hierarchy
//making empty all textbox controls except with id=username
foreach (System.Web.UI.Control control in Controls)
{
if (control is System.Web.UI.WebControls.TextBox )
{
if (((System.Web.UI.WebControls.TextBox)control).ID != "UserName")
((System.Web.UI.WebControls.TextBox)control).Text = "";
}
if (control.Controls != null)
{
DisplayControl(control.Controls);
}
}

}