well first of course you'd need to start the session
register it
then your following pages that you need the session var being used.
start the session except this time start the session as the actual session name you have registered. Check if it registered after that.
I should really be showing you the Manual.
Ok
from there after checking ( session_is_registered() )
if it is registered then do your stuff.
Try to use SuperGlobals with this. When i had the same session name and a var which was the same it messed my sessions up completely
So use $_SESSION