idxman01- Just throwing this out there, may or may not help. I had that happen to me a month and a half ago. ZD1100 would hang up on upgrade. Went over it with tech support and they said its bad RAM. I cant upgrade the firmware anymore. However i can configure it all i want and those settings will be kept. ZD still works. Although I haven't tested out every feature to know its working 100%. We decided to go with the next line up, ZD1200.