Bootcamp Drive Will Not Show Up in Leopard

Hi,
Does anyone know why or how to fix, the fact that my Bootcamp drive doesn't show up in Leopard?
When i go to disk utility, it tells me that its called: disk0s3 and when i click on mount, it says mount failed as it could not be mounted.
When i ran Repair or Verify disk, i get another error that says: Filesystem verify or repair failed.

When i reboot my Mac, and hold option, my Windows Vista bootcamp drive does appear and boots fine. Only when I am in Mac OSX Leopard, does my Vista drive not appear. I also tried MacFUSE to mount it, and even tried Parallels with no success.

Any help would be greatly appreciated.

Thanks
Michael