CD Drives problem

Hey all... I have a standard CD-ROM drive and a CD-RW drive on my PC. They're obviously working because they eject successfully and the LED's on the front flicker. BUT... when I go to view the contents of a CD thats in one of the drives it says "D:\ not accessible" or "E:\ not accessible" depending on which drive i select.

Its funny how its both drives that its happening on and it started happening at the same time :-S Anyone got any suggestions please??

Thanks in advance :)

BIOSTALL

Are they master and slave on one IDE channel?

Check the ribbon cable, perhaps?

Or the jumpers on the back of each drive.