I am completely confused! The reciever I think I understand if the switch under the corisponding number is in the down position that channel is active. I read somewhere that the 1000mw A/B slider should be in the B position. Please confirm. Now for the transmitter. I carefully tore back the foil tape and pried off the heat sink to make sure all switches where visible . There where three switches that could be on or off. They where all on. Can someone tell me how to select different channels? And do they not have to be the same as the reciever? I should point out that I live in Canada so have the luxury of multiple channels.