[flexcoders] Label As Combobox Itemrenderer not working properly

[parjan]

Hello Friends can any tell me what is wrong with this code. I am trying to 
disable the labels but they are not disabled even visible = false not working 
can u tell me why..
here is complete code.
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"; layout="vertical" 
creationComplete="{init()}">


<mx:Script>
 <![CDATA[
        import mx.collections.ArrayCollection; 
        import mx.controls.Alert;       
         [Bindable]     
         public var arrayCollection:ArrayCollection;
         public function init():void
         {
                arrayCollection = new ArrayCollection();
                var a:Object = new Object();
                a.name = 'A1';
                arrayCollection.addItem( a );
                
                
                var b:Object = new Object();
                b.name = 'B1';
                arrayCollection.addItem( b );
                
                
                var c:Object = new Object();
                c.name = 'C1';
                arrayCollection.addItem( c );                           
                
                
         }
                
  ]]>
</mx:Script>

        
<mx:ComboBox dataProvider="{arrayCollection}" labelField="name" width="200" >   
<mx:itemRenderer>
        <mx:Component>
                <mx:Label click="{mx.controls.Alert.show( data.name  )}" 
text="{data.name }" visible="false" enabled="false"   mouseEnabled="false" />
        </mx:Component>
</mx:itemRenderer> 
</mx:ComboBox>



<mx:Label text="Iam Disable" enabled="false" mouseEnabled="false" 
click="{Alert.show('asdsa')}"/>       
</mx:Application>