Problem - Auto Logout from the website???

Hi,
 The website I am working on contains many reports that are generated through SSRS (Reporting Services). This is a .net 2.0 website and we have used Forms Authentication. We need a page to be displayed for 2 hours, but our pages expire within 20 minutes!!!
We have made the following changes, but none of them have worked!!!
1. in web.config - <sessionState mode="InProc" timeout="120">
2. in web.config - <authentication  mode="Forms">  <forms loginUrl="Login.aspx" protection="All" defaultUrl="default.aspx" timeout="120">
3. Set the "Session Expiration time" in the Website in IIS.
4. Set the "Idle worker thread time" and "recycle worker thread time" of the Application pool in IIS
5. Set the Session Expiration time of the ReportServer and Report virtual folders in IIS
 


None of the ...