First off, check to make sure you have the plug from the ESC to the RX plugged in the correct way, easy to get it backwards.

Then go to the bind menu and verify the settings are correct. Set to;
modulation>FH4t
Telemetry>off
Safetylink>1 (set the safety link for each model{different RX}to a different #) *important*
CH1>SHR (unless you are using a Sanwa SRG servo, then SSR)
CH2>SHR
CH3>SHR
CH4>SHR

Now try to rebind RX for each model;
have Tx on and ready in bind menu, highlight bind[enter], (do not press enter yet, just ready to go)

Hold down bind button on Rx first, then power up Rx while holding button.-The blue light on Rx will start to flash slow, let go of button.

Now press Bind[enter] on Tx, the Rx light should flash fast and then go out.

once light goes out on Rx, press enter again on Tx, the light on Rx should come on solid, as well as led1 on Tx. The system should now be bound.

*The above steps need to be done within 10sec., or the Rx will time out, and you need to start again.*

Cycle power, everything should work, if not try again.