I have a new Admiral RX600SP receiver ( going into a FT Mig3 ) that would not bind. Thinking I may have not plugged in the binding plug correct I was checking the plug. I found that as you plugged the binding plug on to the receiver pins, The connector pins in the plug was not locked in the plug housing. As you pushed the plug onto the pins on the receiver, The pins and wires in the binding plug was pushed out of the top of the connector. Used a different binding plug and it took one time to bind. The bad binding plug was new with the receiver. Just a word to the wise, all wiring from the factory is not always correct.