Spektrum Spektrum DX6i and flaps

I built a 6ft Telemaster with flaps. When I built it I only had a Spektrum DFX5e and I plugged the flaps into the gear port in my RX and they functioned properly. I just purchased a DX6i and I am going to use it because it will allow me to do a flap/elevator mix. Ok, now for my problem. I flew today and found they the flaps only activated on the gear switch not the flaps switch. I plugged the flaps into the aux port but nothing happened and the gear switch would not activate the flaps either. How do I get the flaps to activate with the flap switch?
 
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