Here is my code:
******************************************
        import mx.controls.Alert;
        import mx.rpc.events.ResultEvent;
        import mx.rpc.http.HTTPService;

        public class Controler{

                        [Bindable]
                        public var lista:XMLList;

                public function consult():XMLList{
                        var service:HTTPService = new HTTPService();
                        service.url="http://localhost/Something.php";
                        service.useProxy=false;
                        service.resultFormat="e4x";
                        service.addEventListener(ResultEvent.RESULT, met);
                        service.send();
                        Alert.show(lista.length());     //prints 0 =S
                        return this.lista;
                }

                private function met(event:ResultEvent):void{
                        lista = event.result.option as XMLList;
                        Alert.show(this.lista.length()); //prints the real value, actually:
6
                }
        }
**********************************************

The thing is: I got data from a database, working fine, in the
function met I got the data and the alert.show shows the length of the
var lista:XMLList wich is [Bindable] but when i used again in the
consult function I got a big 0 (zero) and I dont know what the problem
is, some help please...

well I know the problem is that the var lista:XMLList dont make the
upgrade but I dont know why...