Pixhawk2.1 to camera gimbal with servo

Hi! I want set this mode to see work it but the servo doesn’t work.
I dont know if the configuration is good but I do it following this page http://ardupilot.org/plane/docs/common-camera-gimbal.html#common-camera-gimbal
This configuration is to plane and I dont know if the channels to choose that I read in this page is good in my case.
I want to see it working with my computer not flying.