Hud throtle with llMessageLinked

i cant seam to figure thi out, it is losely based on hamerhead flight script when you say a number between 0-9 it will set the speed and relay that speed to the hud with llMessageLinked but i cant seam to get it to update in my hid that it was a 0-9 throtle change.

//HUD\\

float updateInterval = 0.5;
integer active = FALSE;


vector hudColor = <0,1,1>;


float hudAlpha = 0.8;

integer throttle = 0;

float GetAngle(float x, float y) 
{
    float targetAngle = llAsin(y) * RAD_TO_DEG;
    if (x < 0.0) 
    {
        if (y < 0.0) 
        {
            targetAngle = -180.0 - targetAngle;
        } 
        else 
        {
            targetAngle = 180 - targetAngle;
        }
    }
    return targetAngle;
}


rotation Inverse(rotation r) 
{
    r.x = -r.x;
    r.y = -r.y;
    r.z = -r.z;
    return r;
}


rotation GetParentRot() 
{
    return Inverse(llGetLocalRot()) * llGetRot();  
}


activate() 
{
    active = TRUE;
    llSetTimerEvent(updateInterval);
}


deactivate() 
{
    active = FALSE;
}


default 
{
    state_entry() 
    {
        llSetText("", hudColor, hudAlpha);
    }

    timer() 
    {
        if (active == FALSE) 
        {
            llSetTimerEvent(0.0);
            llSetText("", hudColor, hudAlpha);
        } 
        else 
        {

            vector xAxis = llRot2Fwd(GetParentRot());
            integer aoa = (integer)llFabs((GetAngle(0.9, -xAxis.z) + 0.5));

            
            integer heading = (integer)(GetAngle(xAxis.y, xAxis.x) + 180.5);

            
            vector velocity = llGetVel();
            integer speed = (integer)(llVecMag(velocity) * 1.94384449 + 0.5);

            
            integer vSpeed = (integer)(velocity.z * 10.0);
            string vSpeedString = (string)vSpeed;
            if (llStringLength(vSpeedString) == 1) 
            {
                vSpeedString = "0" + vSpeedString;
            }
            vSpeedString = llInsertString(vSpeedString, llStringLength(vSpeedString) - 1, ".");

            
            vector myPos = llGetPos();
            float groundLevel = 0.0;
            if (llGround(ZERO_VECTOR) > llWater(ZERO_VECTOR)) 
            {
                groundLevel = llGround(ZERO_VECTOR);
            } 
            else 
            {
                groundLevel = llWater(ZERO_VECTOR);
            }
            integer agl = (integer)(myPos.z - groundLevel - 2.0);
            if (agl < 0) 
            {
                agl = 0;
            }
            llSetText("Speed: " + (string)throttle + "% Airspeed " + (string)speed + " kts\nHeading " + (string)heading + " Alt(AGL) " + (string)agl + "m\nVert " + (string)vSpeedString + "m/sec\n \n \n ", hudColor, hudAlpha);
        }
    }

    link_message(integer sender, integer num, string message, key id) 
    {
        if (message == "stop") 
        {
            deactivate();
        }
        else if(message == "start")
        {
             activate(); 
        }
        else if(num = 5)
        {
            message = (string)throttle;
        }
        else if (message == "hud") 
        {
            if (num == 1) 
            {
                activate();
            } 
            else if (num == 2)
            {
                deactivate();
            }
        } 
    }
}

//Listen in main\\

listen( integer channel, string name, key id, string message )
   {
        //
    }
        else if (llStringLength(message) == 1 && (string)((integer)message) == message) 
        {
            speed = (integer)message;
            llMessageLinked( LINK_ALL_CHILDREN , 5 , message ,NULL_KEY );
        }
        else if(message == "current speed")
        {
            llWhisper(0,"Current Speed at " + (string)speed);
        }
    }