Problem with session timeout in C#

In my 开发者_Go百科web.config file I tried Session.Timeout="1" and found working. Later I tried Session.Timeout="20160". Even if I give such a large number my website "Session Transfers" are being expired in 15-20mins. Do I need to change any settings in IIS? I am using windows 2003 server.

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define in the web configuration file:

<sessionstate 
      mode="inproc"
       cookieless="false" 
      timeout="20" 
     />

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check this :

http://forums.asp.net/t/1283350.aspx

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define in here in web.config file:

 <system.web>
     <authentication mode="Forms">
         <forms timeout="50" />
     </authentication>
 </system.web>

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Seems like session timeout has a max of 24 hours. Check this out http://support.microsoft.com/kb/233477

Set it to 24 hours or less and you will be fine.

Also explained here: http://msdn.microsoft.com/en-us/library/ms525473(v=vs.90).aspx

IIS 6.0: The minimum allowed value is 1 minute and the maximum is 1440 minutes.