Problem arming motors

Hello everyone.
I have a problem with the engine assembly.
My controller is APM PRO Mini.
I calibrated engines and started as indicated, but the problem is when I want to start the engines from the station. I performed as indicated, throttle lever down and to the right but do not start. No arming motors
Something has to be misconfigured. I do not know what’s going on. I have tried in many ways and is not possible.
The controller is powered by an engine ESC.
I hope urgent help please