I'm going through the initial setup of the VOXL m500 and am having trouble configuring the RC transmitter. I am using a Spektrum DX9. After configuring the IP address in the conf file and connecting to the m500 over QGroundControl, I am able to put the receiver into bind mode. After successfully binding, I can move the sticks but QGroundControl does not show any response from the channels. When I attempt to calibrate the RC channels I get an error saying zero channels detected. Does anyone have any ideas where I am going wrong?