LOCAL POSITION NED in MAVLink

[AndiSuryaR]

Hello guys, i have some problem for using msg_local_position_ned in my project. I want to send x,y,z,vx,vy,vz in guided mode, but i don't know how to use msg_local_position_ned. I allready try this program in my project,but it still not working . this my program :

public static void sendGuidedVelocity(MavLinkDrone drone, double xVel, double yVel, double zVel){
    msg_set_position_target_global_int msg = new msg_set_position_target_global_int();
    msg.type_mask = MAVLINK_SET_POS_TYPE_MASK_ACC_IGNORE | MAVLINK_SET_POS_TYPE_MASK_POS_IGNORE;
    msg.coordinate_frame = MAV_FRAME.MAV_FRAME_GLOBAL_RELATIVE_ALT_INT;
    msg.vx = (float) xVel;
    msg.vy = (float) yVel;
    msg.vz = (float) zVel;
    msg.target_system = drone.getSysid();
    msg.target_component = drone.getCompid();
    drone.getMavClient().sendMavMessage(msg, null);
}

``

and i've called that voi sendGuidedVelocity(MavLinkDrone drone, double xVel, double yVel, double zVel) in drone Event .

case AttributeEvent.STATE_VEHICLE_MODE:
                updateMode();
                State vehicleState = this.drone.getAttribute(AttributeType.STATE);
                VehicleMode vehicleMode = vehicleState.getVehicleMode();


                if (vehicleMode == VehicleMode.COPTER_ALT_HOLD) {
                  sendGuidedVelocity((MavLinkDrone ) drone, 1700, 1500, 1300)
                }

this program not working in my project, i hope someone can help me,thanks guys :)