Having kind of a strange problem with my external HDD. I have two USB ports on the front of my case which I normally use to connect the drive (Passport 250GB). For some reason when I plug it in to either of these ports the drive does not work. It powers on but I can hear clicking and nothing happens on-screen. Plug it into one of the rear ports and it works fine! I don't get it. All of my other USB devices (thumb drives, USB headset, card reader) work fine on these two front ports so it's not making any sense. I use this drive primarily for school, and my rear ports are in use for other devices, so I would appreciate any help. Thanks in advance.