I'd start by making sure you put the transmitter crystal in the transmitter. I'd then make sure both are the same channel. You don't say if the transmitter takes a crystal. I'm lost as to why your playing with FM, 2.4 is around 50 for entrance unit with receiver. You need to make sure you put the wires in to the rec correct, signal to center or crystal always. Also your crystals are 27mhz, how about the rec or trans? You would have been better off to buy the Hitec sythz rec and it doesn't need crystals, locks to your FM signal like a 2.4 does. Chris