[flexcoders] looping on results from returned data

[Jason B]

protected function defaultResult(event:ResultEvent):void
                        {
                        var result:Object = event.result;

                           if(result.errorCode > 0)
                                Alert.show(result.errorText);
                                
                        xmlResult = new XML(event.result);
                        for each (var item:XML in xmlResult..release) {
                                
                        trace(item);
                        }
                        }     

says theres an error on xmlResult = new XML(event.result)?

Severity and Description        Path    Resource        Location        
Creation Time   Id
1120: Access of undefined property xmlResult.   massmc/src
massmc.mxml     line 133        1209480418125   630


yet im following a guide off the net on this? anyone know what is
causing this