Classes with guis

[oo_jazz_oo]

Ok, so, I am trying to make a sale system. Its just a basic gui that displays the item name, image, and a buy or cancel button.
The only thing is, I cant get it to display data. ><

My npc in the level:

this.join("shops");
//#CLIENTSIDE
this.shopname = "John's Shop";
this.itemname = "Tommy Gun";

The class:

//#CLIENTSIDE
function onCreated(){

}
function onActionLeftMouse(){
new GuiWindowCtrl("shopwin") {
  profile = GuiBlueWindowProfile;
  x = 10;
  y = 10;
  destroyonhide=true;
  width = 160;
  height = 80;
  text = ""
  
new GuiMLTextCtrl("shopitem") {
  profile = GuiBlueMLTextProfile;
  x = 10;
  y = 20;
  width = 160;
  height = 1;
  text = @this.itemname;
}
  
}
}

Now, when you click the item, a blank gui pops up, and it doesnt display the item name. =/