Thanks for the reply, I didn't get a notification for that.
For Tx and Rx I'm using FlySky
For flight controller, I'm using Navio and Raspberry Pi with emlid Image that has Ardupilot pre-installed
And yeah I got them wired up here
I'm using Mission Planner 1.3.48
For the firmware, it is Arducopter 3.4.6
you said that we should do the airplane mode, well that wasn't mentioned. Please, can you give the chronological steps! Thanks