I took my seagate 120gb hard drive out of one of my computers, which it was working normally in, and put it into an external hard drive case, which was working normally with the hard drive that was previously in it. I then hooked it up to my machine and it recognizes it, says found new hardware and all that; i can see the drive through device manager, but it doesn't show up under my computer and i can't navigate to it. Anyone got any ideas?