Laser printer annoyance

Hi i have a hp laserjet 6l, everytime i reinstall my computer (win xp2, office 2003 and co) everytime i print somthing (i.e.lecture notes) and turn off my comp and try to print something the next day i end up printing the document i printed previously before i shut down my computer. It s pain in the ass if the document is 20 pages cause i have to reset my printer 20 times, i was wondering what is the problem?