Its the first time I've taken the P3 pro out for a flight, all the calibrations go well and I swipe ok for take off. The P3 rose to 1.2m and just hovered, the sticks are unresponsive, so after a 3-4 minutes I press land. I switched everything of and tried again. When I press take of a little window appears saying that the drone will take off and hover at 1.2m. Help what am I missing - the hand brake ?