Ever since we upgraded to HD last fall, our UHF remotes don't work worth a damn on our 722k. We have 3 different remotes (older ones and a new one), and sometimes they work flawlessly, then an hour or 2 later they won't hardly work at all (unless you're standing about 6 feet from the receiver). We never had these issues with our old 522 receiver. I've made sure batteries are fresh, tried a longer piece of coax (to get the antenna up higher), etc. Looking for suggestions and help! It has gotten so frustrating that my wife is ready to throw the remotes across the room. Thanks.