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;
   }