I need help with my 1TB Pro Drive External Hard Drive. I was using it at work today. When I plugged it in, it kept being unmounted properly (not by me-the computer kept seeming to do it) and giving me the warning about it being unmounted properly. Now it seems that it no longer mounts at all. I've tried on several computers (using the firewire and USB cords) and it won't mount at all.The power source light comes on but it won't mount. Any suggestions as to why it won't mount?