Cast exception w FormsAuthentication

From: news.microsoft.com (phewwee_at_yahoo.com)
Date: 10/16/03 

Date: Thu, 16 Oct 2003 14:51:22 -0700

I have a small ASPX app I have created and decided to roll my own Forms
Authentication. Now I take the user name, password and domain and created an
encrypted foms authentication ticket. In the ticket I put some info in the
userdata property. On a different page after authetication I want to accsess
that field. I found a couple of examples, one is like
lblLogin.Text = ((FormsIdentity)User.Identity).Ticket.UserData;

This throws an exception saying cast is not valid. I've looked at this where
the GenericPrincipal is created in the Globalasax file and I can see the
string data in the UserData, does anyone have any idea?

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