Help Needed: Sessions

I am having a couple problems with sessions. I am allowing PHP to record the session information as defaulted to cookies. At the same time I am recording the SessionID and other information to the database when the user logs in. I am also storing some of this data in a session variable called $UserData that is arrayed into the variables I need to pass. Here's a sample of my logon: session_start(); session_name("my_session_name"); session_register($UserData); $UserData["SessionID"] = session_id(); $UserData["SessionName"] = session_name(); PHP_SESSION_RECORD("LOGON"); //This is the function that I use to record the information to the database. Now my problem comes in in that the $UserData is not being saved. I cannot access the information stored in $UserData[] on other pages of the session. It is not unregistered until the user goes to the Logout page. Help is greatly and urgently needed. Thank you in advance. Benjamen R. Meyer