         if(index != -1)
         {
             items.splice(index, 1);
-            if(isStart)
+            if(isStarted)
             {
                 update();
             }

    public function stop():void
    {
        clearInterval(updateInterval);
        isStart = false;
    }
    
    /**

    public function start():void
    {
        updateInterval = setInterval(update, 100);
        isStarted = true;
    }
    
    /**
