Cd/dvd not working

I have a gateway 450rog that had XP home edition on it, my son updated Xp Home Ed to Xp Professional, and now the cd/dvd drive will not work, it was working fine during the Xp update but failed to reconize the drive after we started it back up, anyone got any ideas what is going on?? the cd/dvd is a Quanta SBW242, thanks for your help

Try uninstalling your secondary IDE channel in the device manager and reboot it should re-detect the channel and then the drive.