I had my VIP722DVR replaced a few months ago. Dish didn't want the old unit back so I'd like to pull the recorded programs off of it. I did this before, years ago, and had no problem. Now however, it not working. I have downloaded several shows to an External HD. When I plug the USB into the new unit, one of two things happens: either the drive is rejected as not being compatible, or the transfer starts and then quits do to an error after a few minutes. Since Dish doesn't want the old box back I can pull the drive if I need to. Any ideas?