My motorized system is tracking. I've got good signal quality on most of the transponders on AMC3 @ 87W. I did a blind FTA scan on my receiver. I manually entered 12145 H 4340 (may have been 4344) and got good signal quality there. But after I did the TP scan for FTA channels, nothing came up. I don't understand why I couldn't get Montana PBS. Also, 11736 V 6104 comes in strong, but I can't pick up the MTA channel. Can't seem to get the other PBS channels either. Help, please.