Norton Ghost 15 is locking up on me while running back-up tasks

I run back-ups twice weekly using Ghost 15 on my Windows-7 PC. About 2-weeks ago it quit working but isn't reporting any issues even after a fresh reboot. It looks like it gets hung while trying to create a restore point and never advances after %1 complete. It doesn't appear to be doing anything beyond the first few minutes as task manager shows very little activity.

 

Any suggestions on how to fix this?

 

Thanks in advance!