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. 

Look like aileron and rudder connections are interchanged.

Which FC board u r using? In my kk 5.5 board with stick centering fw (X config) I realised same problem, arming/unarming were changed to aileron chanel instead of rudder ch as manuals.