Have you rebooted the PVR and tried again? If yes and no luck, it could be one of a few things.
Can you watch previously recorded shows? If no, does the PVR still recognize the harddrive properly?
>> Menu > Settings > General > System Info > System Resources
If it can't see the harddrive properly, time to call a tech and replace the PVR. It's possible Telus may have some other things they can try software-wise but I'm not sure.
If these things don't work out.... I would call telus and let their expert staff take a crack at it. Perhaps it is a defective unit.