I have noticed lately that channels listed in my guide disappear and I have to run the signal test in Dish setup, to get them back through the guide update. I have checked my satellite signals and they are all bang on 129,119,110 all are green and okay with signal strengths in the 90's. I have a Dish 1000.02 antenna and Dish 942 DVR. This situation is affecting my scheduled DVR programming,when these channels disappear my scheduled programming does not record and has become unreliable. Any ideas or suggestions, on what I need to do so that channels remain locked in? Many thanks in advance.