My Book 3TB - file system gone, shows up on Win Explorer etc., but not on WD DLG

WD External Drives External Drives for PC
3

I reformatted the drive using XP when I put it into service.  No problems accessing more than 2TB.  I had about 2.5TB on the drive when it went south.

The problem here is that Data Lifeguard does not recognize the drive as a physical drive.  The drive is still communicating via USB, so how do I get DLG to recognize it?

Cal