Debbug vuforia code help

Hello. can you help me with this script.

look my problem in this video http://www.youtube.com/watch?v=Hl6qLOmia2Q

i have this code attach to the GUItexture button. and at the end another script attach to th 3d Teapot. both are java script. when im out the tracker image, the 3d teapot still appear when toching the button. I need that the GUItexture button work only when appear the tracker image.

var enabledState:boolean=true;

var vuforiaVisible:boolean=false;

var myObject : GameObject;

var yourScriptInstance : MyScriptName;

function Start(){

myObject = GameObject.Find("teapot");

yourScriptInstance=myObject.GetComponent(MyScriptName);

//MyScriptName is your script with var enabledState:bool=true;var vuforiaVisible:bool=false;

} function Update () {

if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began){

if (guiTexture.HitTest(Input.GetTouch(0).position)){

if(MyScriptName.vuforiaVisible);

{

myObject.renderer.enabled=myScript.enabledState!=m yScript.enabledState

}

}

}

} 

the script attach to the 3d teapot object

#pragma strict

function Start () {

}

var enabledState:boolean=true;var vuforiaVisible:boolean=false;

function Update () {

}