I recently purchased a AU9-S dish to use when we go camping. I hooked it up to a tripod today to test it out and hooked it up to an extra H21-200 receiver that I have. When I set it up, I chose the Slimline 5 dish and multiswitch. I get all of the channels, but the HD channels don't come in. Is it possible that I need a b-band converter for it to pick up the HD channels?