Hi everybodyHow do I enable autopilot airspeed speed?Here is my code, it doesn't work, please help me to understand what I'm doing wrong?

if( IAS_key == -1  && AUTOPILOT_AIRSPEED_HOLD_var.var_value.n == 1 )	{		trigger_key_event (KEY_AP_AIRSPEED_OFF , 0);				}if( IAS_key == 0 && AUTOPILOT_AIRSPEED_HOLD_var.var_value.n == 0 )	{		trigger_key_event ( KEY_AP_SPD_VAR_SET, Speed_Ind);   // Speed_Ind is a value of IAS I want AP will hold		trigger_key_event (KEY_AP_AIRSPEED_ON , 1);						}

Are you absolutely sure that the autopilot is turned on? You might want to add an AUTOPILOT_AVAILABLE check.-Dai

Problem is found , I didn't enable auto throttle

trigger_key_event ( KEY_AUTO_THROTTLE_ARM, 0);