We used Dish and I had a Tailgater. I found out the coax wire itself can be enough to prevent it from working. And if connecting through the RV - over-the-air connection, it simply did not work. My camper had a separate dedicated Satallite jack for attaching the cable outside the camper. Inside, on the opposite side of the wall was another jack for attaching the coax from the wall directly to the television.
I called DishTV on 2 different occasions and they said the problem was the coax wire. When I got the Tailgaiter, the installer gave me 50 feet of coax. (He did tell me to use that only, and I thought I knew better). Whenever I attempted to connect with any other kind of coax, the Tailgater failed.
I forget the difference in the wire, but there is some kind of rating difference. That might be part of the problem. Next, Dish does not play nice with other Television systems. It needs a dedicated line to your television (Dish Receiver), not going through a bunch of switches and stuff first.
If you can run a dedicated line from the Tailgater directly to the television (Dish receiver) (like put the wire through a window), you'll find out immediately if coax wire is the right kind. If you still cannot connect, it's the wrong wire.
I'd start there.
By the way, we quit DishTV. Got tired of them jacking our prices up. But I now have a really nice Tailgater cube I'm using for a door stop!
