Session Close up to logout button Click

Question

Hai.

Actually My Doubt , Already ask . but, i am not understand not working.

Session Close:

My Error is:

i am create session in login page. and also ass webconfig in session time out=50000. or any number. it automatically close with in 2 min. but, i want minmum 2 or 3 hours and click logout button after session close.

my possible techniques but, not working:

1.remove session tag in webconfig.

2. time increase also.

But, not working,

so, please slove my problem. i suffer this problem in almost 5 months. but, no solution .

and page extention remove with asp.net.

and very slove page loading in asp.net web pages.

please tell me any one .