Pixhawk setup problems - can't throttle up ESCs

Hello, I have 2 drones.. both DJI F550. Drone #1 uses Naza Lite controller and works great!

My second drone is controlled by a Pixhawk.

Pixhawk

OPTO 30A ESC

DJI 2212 motors

4S battery

Spectrum DX9 transmitter

Spectrum AR8000 receiver

3DR PPM Encoder

Problem #

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