I just switched from Directv HD to Dish Network to get a 921 HD DVR. While with Directv, I received all of my local digitals with no problem. When the 921 was installed, I replaced my antenna with a better high def antenna. After setting up, one of my local channels with a transmission tower less than 8 miles from my home, does not come in. I've tried adding the channel manually. When I do, the signal meter will not go above 70 and the station won't lock in. All other local digital channels are coming in and the signal meter is at or near the peak. Anyone have any clue what I should do next? Could this be a problem with my 921? I can't imagine that I have to live without HD for my local NBC affilliate (Cleveland)