I agree with Dave 967
What receiver are you using I think the only ones you can use areGR3E, GR3F, R6B,R6C and R9B that have the same protocol as the transmitter?
If you plug the Bind Plug into the battery socket and a 6 volt battery into channel 3 does the red light come on and flash with the transmitter turned off. If it doesn’t
that would point to a receiver problem.