My second television is in another room and is about 30' from the main unit (625). Over the last year the signal has gotten harder to pick up to change the channel. Now most of the time I have to get directly in front of the receiver to change the channel on the second TV. Sometimes I can be 25' from it and pick up the signal. Is this the way it is supposed to happen--it works and then after a year or so (maybe two?) it stops? It isn't any fun to have to keep leaving a room to change a channel. Dish called a few weeks ago and when I told the lady said buy new batteries. But it is not the batteries. Then she said buy a new remote. It is not the remote is it?