Spektrum Failsafe???

[Ponch]

Try binding again, and don't use the failsafe right now that you had on your revo before (so just using the built in one)

Press/hold the bind button on the receiver
turn on receiver, continue to hold button until led flashes
hold desired failsafe positions on radio (usually some brake, steering straight)

While holding failsafe positions, hold bind button on radio and turn on while holding both failsafe positions and the bind button till the bind button on the tx flashes and then you can let off. Let it sit for a minute till both lights are steady and then you should be good to go.