Logout problem

Hi, 


I have started work on a web project that uses Forms
based authentication. The user name and password details are checked against
the active directory.  After authentication,
user is sent to default page where he/she can browse other pages.


 


I am having a master page, where I added a logout button and
code behind for that button click is:


 


  Session.Abandon();


        System.Web.Security.For ...