I'm testing some things with unity right now, and I am trying to make it possible to load anther scene by walking into a collision box that is a trigger, after doing this a GUI should pop up saying press E to enter, However nothing happens with you enter the box. What is wrong?

pragma strict

 var theDoor : Transform;
 private var drawGUI = false;
 var Scene : int = 0;
  
 function Update () 
 {
     if (drawGUI == true && Input.GetKeyDown(KeyCode.E))
     {
        Application.LoadLevel(Scene);
     }
 }
  
 function OnTriggerEnter (theCollider : Collider)
 {
     if (theCollider.tag == "Player")
     {
        drawGUI = true;
     }
 }
  
 function OnTriggerExit (theCollider : Collider)
 {
     if (theCollider.tag == "Player")
     {
        drawGUI = false;
     }
 }
  
 function OnGUI ()
 {
     if (drawGUI == true)
     {
        GUI.Box (Rect (Screen.width*0.5-51, 200, 102, 22), "Press E to open");
     }
 }