Script Not Working

I'm making an inventory system, but when I click any of the buttons it doesn't say which button was clicked. It is programed to say in the log what button was pressed, but never says anything, here is the script:

 #pragma strict
 
 var ShopName : String;
 
 var Enabled : boolean;
 var BackgroundTexture : Texture;
 var Items : String[];
 var ItemTextures : Texture[];
 
 private var shopSize : Rect = Rect(Screen.width / 2,0,600,800);
 private var scrollPosition : Vector2;
 
 
 function Start () {
     shopSize = Rect(Screen.width / 2 - 300,0,600,Screen.height);
 }    
 
 static var ItemImages : Texture[];
 
 function Update () {
     ItemImages = ItemTextures;
 }
 
 function OnInspectorUpdate(){
     
 }
 
 function enable(i : boolean){
     if(i == true){
         Enabled = true;
     }
     if(i == false){
         Enabled = false;
     }
 }
 
 function OnGUI(){
     if(Enabled == true){
         shopSize = GUILayout.Window(200, shopSize, ShopWin, ShopName);
     }
 }
 
 function ShopWin (windowID : int) {
 
     scrollPosition = GUILayout.BeginScrollView (scrollPosition, false, true, GUILayout.Width(80),GUILayout.Height(Screen.height - 100));
     
     GUILayout.BeginVertical();
     
     for(var i:int =0;i<Items.length;i++){
         if(ItemTextures.Length > 0){
             if(GUILayout.Button(ItemTextures[i], GUILayout.Width(60), GUILayout.Height(60)))
             {
                 Debug.Log("Clicked: " + Items[i]);
             }
         }
         else{
             if(GUILayout.Button(Items[i].ToString(), GUILayout.Width(60), GUILayout.Height(60)))
             {
                 Debug.Log("Clicked: " + Items[i]);
             }
         }
         
     }    
     GUILayout.EndVertical();
     GUI.DragWindow();
     GUILayout.EndScrollView();
 }

Does anyone see what is wrong?