Need Help on kOS Autopilot Script

[Azerty]

Hello, I'm trying to improve an old SSTO autopilot but it doesn't work and i can't figure it out why.

Here is my script :

CLEARSCREEN.

BRAKES ON.
SET LOOP TO TRUE.
SET THROT TO 0.
SET Y TO 0.
SAS OFF.
RCS OFF.
CLEARSCREEN.

SET STEP TO "Ignition".

function display
{
    PRINT "Altitude: " + SHIP:ALTITUDE AT (15,4).
    PRINT "Speed: " + VELOCITY:SURFACE:MAG AT (15,5).
    PRINT "Apoapsis " + APOAPSIS AT (15,6).
    PRINT "Periapsis " + PERIAPSIS AT (15,7).
    PRINT "Time to Apoapsis: " + ETA:APOAPSIS AT (15,8).
    PRINT STEP AT (15,9).
    PRINT Y AT (15,10).
    PRINT SHIP:BEARING AT (15,11).
}

UNTIL LOOP=false
{
    display().
    LOCK THROTTLE TO THROT.
    LOCK STEERING TO HEADING(90,Y).
    IF STEP="Ignition"

    {
        SET AG1 TO TRUE.
        SET THROT TO 1.
        BRAKES OFF.
        SET STEP TO "TakeOff".
        CLEARSCREEN.
    }

    IF STEP="TakeOff"
    {
        SET Y TO 7.
    }
}

Actually my problem is the LOCK STEERING. It lock the steering indeed but not at the right pitch. I made another script in which it works so i don't understand what is happening.

Thanks for your help.

Edited October 5, 2018 by Azerty

[Azerty]

My script works but for an unknown reason my reference pitch is 12° below 0°. If i want to pitch to 7° i have to write 19...