Hi to all

I've a problem with addListener

my code:
Code:
 var myPanel = new Ext.Panel({
    items:[{
        region: 'north'
        ,... some proprerties here
        ,items:[{
        ... some items here
      }]

    ,listeners:{
        afterrender: {
            fn: function(){
                console.log('afterrenderer');
                myPanel .addListener(
                    'bodyresize'
                    ,myPanel .syncSize()
                );
            }
        }
    }
I'll need to syncSize() the Panel when the browser's resized but don't work at all.
Firebug say to me that's not a function or not an element or the like.
I'd tried to rewrite it in many way that's I'm out of idea.
Can someone help me?
Thanks