I tried your zip file, both the trex450 and the TrexRTest had issues. for one when I moved the aileron stick only the aileron servo moved, I should have seen both the AIL and PITCH servos moving. Also, when I moved the elevator stick both the elevator and AIL servos moved...in fact no stick movement at all caused the PITCH servo to move at all....including the Throttle stick.
IGNOR this ...the solution was: his PITCH was set on CH6 and I had that servo plugged into CH5 on my Rx.