Hi!
I've got a login script that makes use of php sessions. When you first login everything is working fine and your variables are taken with you over the site when you click a link once. However, when you klik another link, the session ends and for some reason you're logged out and have to log in again. You can see what I mean by visiting: http://members.lycos.nl/mentorsite/ Just fill in Testaccount as Nickname and test as password in the login box on the left, klik for example on the forum link and click (via the menu) on the index link afterwards.
If you know what's wrong, then don's hesitate and tell me 😉
Greetz!