I have select function 4 & mode 2 in RCB6i remote. but according to Hexa flight controller motors should be lock by full throttle down and rudder full left & for motors unlock full throttle down and rudder full right but it's not happen. when i put throttle down and alioron left then motors are unlock and full throttle down and aliron right then motor locked. also my quad not stable. kindly suggest me.