Studio Edition II eSata Issue

I recently got a new computer.  I had my Studio drive connected to the old computer and mapped to it.  I decided to move it to the new computer since it had an eSata port.  I purchased an eSata cable and connected it to the new computer.  The device is not being recognized.  I finally hooked it up using the USB cable and everything is fine.  I am running Win 7 Pro 64-bit.  Does anyone have any idea why the O/S is not recognizing the eSata connection?