Cannot go into stabilize or any other mode in from terminal

hey guys,
i have connected pixhawk with raspberry pi via serial, but i cannot go into stabilize or any other mode, it is showing “Mode(19)>” in the terminal.
And how can i check whether my pixhawk has been successfully connected with pixhawk.

Haider,

That’s interesting. Mode 19 on copter is Avoid_ADSB. It doesn’t have a name probably because the version of MAVProxy and/or pymavlink is out of date. If the vehicle is disarmed you should always be able to switch to stabilize mode so not quite sure what’s going on. Maybe it would be best to directly connect the pixhawk to your PC and see that it’s operating ok?

https://github.com/ArduPilot/ardupilot/blob/master/ArduCopter/defines.h#L86
http://ardupilot.org/copter/docs/common-ads-b-receiver.html#common-ads-b-receiver