I have directv in my home. There's one hr24, and three h20 recievers, with a Slimline swm3 dish. Everythings works fine at my home. My problem is when I take one of the h20 recievers from home, and connect it to a slimline swm3 dish at my rv, using the power supply that came with the dish, the receiver will not go to set up mode. The screen shows searching for sat signal. I press the menu button and nothing happens. Tried two different receivers and no change. Thanks in advance for any help.