LoadLevel to menu error

Hy! I have problem with LoadLevel back to menu. I have only 1 level. And on the end of level i want load back to menu When i start game menu work as well. But when i have score 2 load me back to scene "menu" but button to start level dont work anymore.

I have script:

public var kuna:int;

static var score:int=0;

private var textfield:GUIText;

function Update(){

if (score==2){ Application.LoadLevel("menu"); } }

function OnTriggerEnter (other : Collider ) { if (other.tag =="kuna") { Destroy (other.gameObject); score+=1; } }

function OnGUI (){ GUI.Box (Rect (0,0,150,60),""); GUI.Label (Rect (10,5,100,50),"Pokupljeno kuna:" + score); } Here is link to game: http://crokamagra.com/zavrsna/dada/WebPlayer.html