I think it's my 50ft hdmi cable that is causing a problem but not sure. When I hook my dish 612 box to a tv using 6ft hdmi cable everything works fine. When I hook it up using 50ft cable I get picture and sound but the dish box locks up and I can't change channels or do anything really with the dish box for a couple of minutes. As soon as I unplug the cable and plug the 6ft cable back in everything works fine. I'm using a 24awg in wall cl2 1.3 hdmi cable. Would it be the cable or the box?