Signout Authenticate

Basically I was getting an error using the Radajax upload control that happened on log out. I remedied this by setting the logout address to  Response.Redirect("Login.aspx?logout=1", True) and passing it in as a perameter to trigger the sign out on the log in page. However I'm having problems.

If Not IsPostBack Then 'logout perameter = 1 If Request("logout") = "1" Then FormsAuthentication.SignOut() End If End If If Not IsPostBack Then If User.IsInRole("Staff") Or User.IsInRole("Administrator") Then CreateUserWizard1.Visible = True CreateUserWizard1.Enabled = True cbRoles.Enabled = True cbRoles.Visible = True EALogin.Visible = False EALogin.Enabled = False btnReturntd.Visible = True btnReturntd.En ...