CAR ENTER EXIT

MY PLAYER GETS IN CAR BUT MY CAR DOENT WORK

HERES MY ERROR-NullReferenceException: Object reference not set to an instance of an object Boo.Lang.Runtime.RuntimeServices.GetDispatcher (System.Object target, System.String cacheKeyName, System.Type[] cacheKeyTypes, Boo.Lang.Runtime.DynamicDispatching.DispatcherFactory factory) Boo.Lang.Runtime.RuntimeServices.GetDispatcher (System.Object target, System.Object[] args, System.String cacheKeyName, Boo.Lang.Runtime.DynamicDispatching.DispatcherFactory factory) Boo.Lang.Runtime.RuntimeServices.SetProperty (System.Object target, System.String name, System.Object value) car get in.Update () (at Assets/car get in.js:21)

AND

HERES MY SCRIPT -

 var Car : Transform;
  var player : Transform;
  var exitPoint : Transform;
  var doorTriggerLeft : Transform;
  var PlayerCamera : Camera;
  var CarCamera : Camera;
  var isPlayerVisable : boolean;
  
  function Update (){
      if (Input.GetButtonDown("Fire1")&& isPlayerVisable){
          //Make player invisable and still standing
          player.gameObject.SetActiveRecursively(false);
          player.gameObject.active = false;
          // Parent player to ExitPoint
          player.parent = exitPoint.transform;
          player.transform.localPosition = Vector3(-1.5,2,0);
          //Parent playerParent to car
          exitPoint.parent = Car.transform;
          exitPoint.transform.localPosition = Vector3(-0.5,2,0);
          // Enable car as controllable object
        GameObject.Find("Car").GetComponent("Car Control script").enabled = true;
          PlayerCamera.enabled = false;
          CarCamera.enabled = true;
      }
 
      else
      {
          if (Input.GetButtonDown("Fire1")){
              // Make Character visable again.
              player.gameObject.SetActiveRecursively(true);
              player.gameObject.active = true;
              // Unparent Player from everything.
              player.transform.parent = null;
              // Parent Exit Point to Door Trigger.
              exitPoint.parent = doorTriggerLeft.transform;
              // Disable car as a controllable
              GameObject.Find("Car").GetComponent("DrivingScript").enabled = false;
              PlayerCamera.enabled = true;
              CarCamera.enabled = false;
          }
      }
  }
  
  function OnTriggerEnter(Player : Collider) {
      isPlayerVisable = true;
  }
  
  function OnTriggerExit(Player : Collider) {
      isPlayerVisable = false;
  }