With my Futaba gear, I have had to reverse the throttle servo channel (3) in order to get proper operation with my ESCs. This has been true with both brushed and brushless ESCs. If your motor won't start and you get the programming beeps (because the ESC thinks it's seeing full throttle when it's actually zero), consider this possibility for your set up. Also, it might be a good idea to omit the prop until you verify normal throttle operation. Good luck with the replacement.