Only channel 1 on Pixhawk 2.4 .8 works

Hello everyone!
Thanks for reading this.
I’m creating a boat, and I’m using the Pixhawk 2.4.8 flight controller board. I have Mission Planner and I have used it to calibrate the Radio and a few other things.
My problem is that all the channels, such as pitch, yaw, etc are working properly and I’m getting feedback from Mission Planner showing the inputs from my transmitter. However only channel 1 from the Pixhawk is working. I am using T8FB RadioLink.

Throttle output is not enabled unless the autopilot is armed.

The one channel is probably rudder as its a servo and not locked out by the motor not being armed… what yuri said…