I have not been able to watch channel 576 high def for years and paying close to $300 a month . Every other high def channel works all high def sporting events come in perfect except for the Philly/comcast channels/events they come in with screen freezes and pixilation. there are no loose connections , all other high def sports events on other channels work perfect, the Eagles work perfect, sixers on ESPN works perfect. I only get a run around from Verizon, ... can someone tell me what is going on?