I have a question on setup. For two years I have used my H21 in our park model trailer at our permanent site. Just had to hook it up and did not have to redo setup. Last fall at home I changed to the whole house setup -SWiM. This receiver is normally in our basement rec room. Yesterday I connected it in the camper and I am getting message 775 that the receiver is not communicating with the dish. I went to rerun the setup and this has changed so I need help. I am a novice. What needs to be changed to rerun setup to go back to the slimline setup with a straight run connected to RV using b band converter.