Clearing all textboxes on CreateUserWizard control in ASP.NET 2.0

[asumal]

Hello

I am new to ASP.NET. I am using CreateUserWizar d control to register & create a user. I am using Membership API. I have a Cancel button on the CreateUserWizar d 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 CreateUserWizar d control which takes user's login ,Security question & answer information. My code is as follows:

protected void CreateUserWizar d2_CancelButton Click(object sender, EventArgs e)
{//Calling a function & passing all the createuserwizar d controls
DisplayControl( CreateUserWizar d2.CreateUserSt ep.ContentTempl ateContainer.Co ntrols);
fstname.Focus() ;
}

private void DisplayControl( ControlCollecti on 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.W ebControls.Text Box )
{
if (((System.Web.U I.WebControls.T extBox)control) .ID != "UserName")
((System.Web.UI .WebControls.Te xtBox)control). Text = "";
}
if (control.Contro ls != null)
{
DisplayControl( control.Control s);
}
}

}