I just reinstalled Win 7, My Book 3.0 no longer recognized. Need a driver?

I just reinstalled Win 7 64 bit, My Book 3.0 no longer recognized. It has been working fine. I need this backup! Do I need a driver?

Check if its recognized on the disk management window. 

Also try different USB ports and a USB 2.0 one. That will help narrow things down.

Joe