I recently bought a cabin that already has a directv dish on the roof. I was hoping I could just bring my genie from home with me, hook it up, and it would work. Tried this today and got a 775 error code. I have an HR54-500 receiver and the dish at the cabin is a SWM SL5. Should it have worked or is the dish not compatible with my receiver? Or do I need a power inserter?