Disk out of Dish DVR

I am replacing my old Dish DVR with a new HD DVR and I am trying to copy off a couple of the shows we had recorded. I removed the drive from the case, attached it to my home computer running Windows Vista and the OS can see the drive but shows the space as unallocated. I understand that Dish uses a Linux operating system so I installed an EXT2 driver, still no luck. I have shut down and rebooted several times.Anyone out there with a suggestion on what to try next?

Don’t waste your time. Even if you manage to access the files, they are encrypted.