this is what I got from google:

MLP4DSM Binding Procedure
1. Disconnect the flight battery from the Quad-Copter. (read link and bot)
2. Center all trims on your transmitter. Refer to the transmitter control section for trim instructions.
3. Power off the transmitter and move the throttle stick to the down/off position. (in our case keep it centre for forward/backward control)
4. Connect the flight battery in the Quad-Copter. The LED on the 4-in-1 Control unit flashes after 5 seconds.
5. Push in and hold down the left stick while powering on the transmitter (you will hear a ‘click’). (I think you should swap step 4 and 5 out. try both just to be sure)
6. Release the left stick. The transmitter will beep and the power LED will blink.
7. The Quad-Copter is bound when the LED on the 4-in-1 control unit is solid blue (not blinking).
8. Disconnect the flight battery and power the transmitter off.

might be worth a try, cause you'll want all channels to failsafe.