Well I solved the problem! I just reseated the 20gb hard drive in the module and it worked. Yeah it worked on both Latitudes; my c610 and my cpi. I emailed dell tech support and they said I couldn't do anything... that it could only take 12 gb. Well there you go... never listen to the expurts, cos they were as useless as a chocolate teacup. Well if anything has the same problem, I hope this helps. Pass it on.