Session Problem

Hi there, I am using a session for authenticating users. The script i use to authenticate is auto prepended to all other scripts. This authentication works fine but when i want to register another variable from within another script, it doesn't work. I've tried with a and without creating a session in the other scripts but this doesn't work. My question is can i use a session within a session and if so, how can i do this? Thanks, Jeroen Geusebroek