Mission Planner RC Calibration Not Responding

I have a DSMX DX9 Transmitter and an OrangeRx R615x Receiver. I have an APM 2.8 (Arducopter) running firmware 3.2.1. I am extremely new to the drone world, so I apologize in advance for any incorrect info/stupid questions. When I attempt to calibrate my radio in Mission Planner, none of the green bars respond to my moving of the tx sticks. Except, when I move switch D, the green bar for Roll responds. The reciever is bound to the transmitter, so I’m not sure why this is happening. All trims are set to zero, if that has anything to do with it?
If anyone could offer any advice, I would be very grateful. I can upload pics if needed.

I’m not familiar with dx9, but I think you should check your channel assignment.