Question

I have a site that uses roles (which I really don't understand).  Below I set up a auth (which is needed to be anywhere in the site) and a role (which is needed to be in certain parts of the site). So here is the problem, if I sign in it seems as though I dont get authed so I get placed back to the log in screen (i.e. Nothing really happens), If i use Guest then the site works perfect.  Here is the catch, if I use Guest then logout and sign in then the site works perfect.  When signing out I use FormsAuthentication.SignOut()
If Sign in then:

FormsAuthentication.SetAuthCookie(txtUsername.Text, True)
            Dim authTicket As FormsAuthenticationTicket = New FormsAuthenticationTicket(1, User.Identity.Name, DateTime.Now, DateTime.Now.AddMinutes(15), False, role)
            Dim encTicket As String = FormsAuthentication.Encrypt( ...