Toggle bool with keypress

When i press escape, nothing happens...

 #pragma strict
 
 var windowTexture : Texture;
 var viewScreenBorderTexture : Texture;
 var shipMenu : int = 0;
 var pauseMenu : boolean = false;
 
 function Start () {
 
 }
 
 function Update () {
     
         if(Input.GetKeyDown(KeyCode.Escape)){
     pauseMenu = !pauseMenu;
     }
 
 }
 
 function OnGUI () {
     
     if(pauseMenu == true){
     GUI.DrawTexture(Rect(50,50,6,300), windowTexture);
     }
 
 
 }

The variable pauseMenu is not changing in the inspector. But if i click it on and off manually (again, in the inspector), my menu appears and disappears as it should.

I suspect that GetKeyDown is the culprit... Thanks!