Can somebody explain transponders to me? I was trying to get some local US channels in Mexico.... they come off 119, but they are like in the 45, 89 transponders.... when I go to point dish page it only allows me to change the transponder up to 21? I get about a 75% signal down here. Any...

I brought my dish reciever and a new dish down to Mazatlan with me. I set up my dish and have a good signal.... but I don't get any service? It says I need to subscribe for the channels? I am a paying customer in US ..... Can dish block my service in Mexico? I'm not too technical so any...