Firmware 2.68 b6
Gimbal MR Pro 2 HD Air
Pixhawk 2 ArduCopter 3.5.7

Connected to Telemetry 2

SERIAL2_BAUD = 115
SERIAL2_PROTOCOL = 1
SR3_EXTRA1 = 20
SR3_POSITION = 5
SR3_RC_CHAN = 20
MNT_TYPE = 4
MNT_ANGMAX_PAN = 18000
MNT_ANGMAX_ROL = -18000
MNT_ANGMAX_TIL = 9000
MNT_ANGMIN_PAN = -18000
MNT_ANGMIN_ROL = 17999
MNT_ANGMIN_TIL = -9000
MNT_DEFLT_MODE = 3
MNT_RC_IN_PAN = 12
MNT_RC_IN_ROLL = 11
MNT_RC_IN_TILT = 10
SERVO10_FUNCTION = 7
SERVO11_FUNCTION = 8
SERVO12_FUNCTION = 6

RC_ROLL pin mode = Serial port (Serial API, etc.)
ROLL = RC_ROLL- PWM
PITCH = RC_PITCH - PWM
YAW = RC_YAW - PWM
Serial Port = RC_Serial
System Id/Component Id = 1,154
Port settings = 115200, none parity
Options: x Send Heartbeat x Debug x Query RC data
MavLink control mode: Control all axes

AHRS: OK (~40ms), GPS: low rate (~200 ms), RC: OK, Control: no

Cannot control gimbal at all, what have I done wrong here?
Also no movement or rc changes when RC_VIRT_CH_10-12 is selected