It is not detected therefore will not show up in the bios. Can you open/close the door? If not, then there is no power going to it. Recheck your molex going to it. If there is power to it then check your IDE cable. It may be seated wrong at one end or you may have put it upside down. As the major said, check your master/slave jumper select in the back of the cd rom.
yeah, theres power going to it, i have tried 2 cdrom drives, one a 24x and one a old quad speed one. i have checked the jumpers, ide cable as well, it just doesnt detect it.