I have a Panasonic plasma tv and a dish 942 box. Every now and then my dish box stops receiving signals from my remote unless I walk right up to the Dish box and hold the remote inches away from the IR receiver. At first I thought this was a problem with the box, but recently swapped it out and I still have the same problem. Then I thought it could be the plasma tv, but my stereo and dvd player (which are much older than the 942) work fine regardless of the tv. Any suggestions of what's going on here?