Newbie PHP/MySQL Question

Ok, Im' pretty new at this, but I can't see what may be wrong here: Table IMT --------------------- User (char) SessionID (char) StartTime(TIMESTAMP) EndTime(TIMESTAMP) Code on first page: INSERT INTO IMT VALUES ('testuser', '$id', CURRENT_TIMESTAMP, '/0'); Code on second page: UPDATE IMT SET EndTime=NOW() WHERE SessionID='$id'; The problem I am having is that when the second page is executed, it places the current time in both StartTime and EndTime. However, while I am viewing the contents throught the process, the StartTime value is correct until the second page is executed, and then whatever is placed into EndTime shows up in StartTime. If it matters, the only session variable i'm using is session_id(). TIA Pete van der Maas