Programming for dual elevator servos
 

Having trouble setting up my channel mixing for dual elevator servos and dual aileron servos. Radio is Spektrum DX7 with AR9000 receiver. My aileron mixing works using the aileron and gear channels on the mix 1. Tried to get elevator mixing to work with elevator and flap channels. The servo plugged into the elevator channel works, the other servo wants to respond to aileron stick movement. I've tried the Aux 1 and Aux 2 channels as slave. I'd like to use mix 5 or 6 in order to get sync'd trim, which means I'll also have to move the aileron mix to one of those too. Can anyone walk me through this? As you probably know, the Spektrum manual has no troubleshooting instructions for this programming. I would really appreciate it.

ChiefK