Could it possibly be a heat issue? I recently replaced an older HD for example, with a newer one, and even though it had a fan going, when I closed my case up, it ran fine for about an hour then overheated.

I opened the case back up, re did my wiring, and everything seems fine now.

Outside of that, you might try checking the sleep settings, and possibly, the USB settings. Windows 7 has a thing that will turn on and off USB ports, unless you tell it not to.

Just a few ideas off the top of my head. hope you get it up and running though.

Stephen logs off humming Bruces Philosophy song now.