I have a 722k with an EHD, a WD Elements 2TB. When I try sending programs to the EHD, the receiver reboots. I can access the EHD, view programs on the EHD, even restore programs from the external to the receiver. However, sending programs to the EHD is a no go. I called tech support, and was told that, "This is an unusual problem, and it has been submitted to the engineering department." I was then told to have a nice day, and that was it, lol. I have tried 2 other EHD, different USB Cables. I have tried the front USB Slot, the power cord pull... all with the same result. I am out of ideas, any help would be appreciated.