Approx two weeks ago, my AM21 stopped receiving my OTA channels. I was getting error 792. I decided to set up the antenna again. When I do that I go through all the steps, and the dvr goes back to initialize antenna. The only thing that has changed is my DVR software was updated to 0x67e. My TV tuner picks up all the locals plus I live a few miles from the transmitters. The equipment I have is a HR34 with a AM21N, and I live in the West Palm Beach area. Please help.