A script stopped working!

I modified the PlayerWeapons script from FPS tutorial to pick up GUI Texture taps. This script worked perfectly fine, even after modification, and just stopped working:

 var fireButton : GUITexture;
 
 function Start () {
     SelectWeapon(0);
 }
 
 function Update(){
 
     for (var evt : Touch in Input.touches) {
 
         var HitTest1 = fireButton.HitTest(evt.position);
 
         if (evt.phase == TouchPhase.Began) {
 
             if(HitTest1){
 
             //do something when button is hit
 
             BroadcastMessage("Fire");
 
             Debug.Log("Shooting");
 
             } 
         }
     } 
 }
 
 function SelectWeapon (index : int) {
     for (var i=0;i<transform.childCount;i++)    {
         // Activate the selected weapon
         if (i == index)
             transform.GetChild(i).gameObject.SetActiveRecursively(true);
         // Deactivate all other weapons
         else
             transform.GetChild(i).gameObject.SetActiveRecursively(false);
     }
 }