Session object only lasts few seconds

[Entrep]

Hi,
When I test my asp.net website app in my win 2000 server in Administrator user mode, the session I start (Session("user_ses") = myclass) only lasts a few seconds. But if I do the same as a ‘common’ user the sessions lasts 20 minutes, which is the time I set in web.config file:

<sessionState mode="InProc" cookieless="false" timeout="20" />

So, which is the reason the session lasts so little in Administrator user mode in windows 2000 server?

Thanks