Accelerometer Plane Controls help

I've got a plane game and I need it to move and fly with accelerometer controls. I've found this script form another flying game but it does nothing to my plane. Any ideas. (complete novice)

 var sensitivity : float = 10.0;
 
 var forwardForce : float = 1.0;
 var guiSpeedElement : Transform;
 
 private var normalizedSpeed : float = 0.2;
 private var euler : Vector3 = Vector3.zero;
 
 var horizontalOrientation : boolean = true;
 
 function Awake () {
     if (horizontalOrientation)
     {
          Screen.orientation = ScreenOrientation.LandscapeLeft;
     }
     else
     {
          Screen.orientation = ScreenOrientation.Portrait;
     }
 
     guiSpeedElement.position = new Vector3 (0, normalizedSpeed, 0);
 }
 
 function Update () {
     for (var evt : Touch in Input.touches)
     {
         if (evt.phase == TouchPhase.Moved)
         {
             normalizedSpeed = evt.position.y / Screen.height;
             guiSpeedElement.position = new Vector3 (0, normalizedSpeed, 0);
         }
     }
 }
 
 
 function FixedUpdate () {
     rigidbody.AddRelativeForce(0, 0, normalizedSpeed * forwardForce);
     
     var accelerator : Vector3 = Input.acceleration;
     
     // Rotate turn based on acceleration        
     euler.y += accelerator.x * turnSpeed;
     // Since we set absolute lean position, do some extra smoothing on it
     euler.z = Mathf.Lerp(euler.z, -accelerator.x * maxTurnLean, 0.2);
 
     // Since we set absolute lean position, do some extra smoothing on it
     euler.x = Mathf.Lerp(euler.x, accelerator.y * maxTilt, 0.2);
     
     // Apply rotation and apply some smoothing
     var rot : Quaternion = Quaternion.Euler(euler);
     transform.rotation = Quaternion.Lerp (transform.rotation, rot, sensitivity);
 }