Quicktime - Bad Atom Error

[mattey123]

I'm running vista ultimate x86 and i have the latest itunes and quicktime installed. I recently changed hard drive and on my new hard drive when i try opening some of my mp4's in quicktime i get a bad atom error. Now i know for a fact they work, they open fine in wmp and on my other pc in quicktime so they aren't corrupted in any way what so ever. It's just frustrating that it's took me ages to build up my mp4 collection and they won't work with itunes or quicktime anymore, therefore i can't copy them to my ipod.

Anybody have any idea's? Help much appreciated!!!