Flysky GT3B

[Brewskie]

can anyone help as this is driving me crazy, trying to bind to receiver an seems ok as gan get steering but there is no throttle, tried receiver with old handset an works fine, my ESC is an Exceed race pro an when turning it on it beeps a couple times an then turns green on my old transmitter an everythings fine but try flysky, i get 1 beep for steering yet no throttle