Shot in the dark: what is session expiration time? Can you experiment with increasing/decreasing it?

>Hi,
>
>I'm having a little problem with my website. I use ASP pages (not ASP.NET) and a database in SQL Server 2000.
>
>The thing is that I can log my user in the application by checking his name and password in a table of the mentionned database. Once this is done, I open the access to the rest of the website.
>
>Once the user is logged in, the session variable are filled with the information on his account.
>
>Then I try to view the content of a menu in the website and I lose the content of all my session variables.
>
>1. To connect I use a DSN on the database of the SQL server.
>2. I have 2 backups of the mentionned database from 2 of our clients. One will work just fine in the website, the other won't.
>
>Is there something wrong on one of the database, is there a setting missing...
>
>Thanks
>-Michael