Throttle setting for Gas Engine

1

Hi to all i have fixed wing wing aircraft with gas engine i have flown that with cube black all good except i am enable to set throttle in auto mode. whenever i switch auto throttle goes full and than doesnt change from mission planner. please guide me how to set throttle in auto mode without pitot tube.

2

http://ardupilot.org/plane/docs/common-mavlink-mission-command-messages-mav_cmd.html#mav-cmd-do-change-speed