CallResponder works in MXML but not actionscript

i working on flex/php app , when flashbuilder auto-generates mxml code looks this:

 

<s:callresponder id="getusersresult"                          result="appmodel.user = getusersresult.lastresult[0] user"/> <userservice:userservice id="userservice"             fault="alert.show(event.fault.faultstring + '\n' + event.fault.faultdetail)"             showbusycursor="true"/> 

and calls function:

 

getusersresult.token = userservice.getusers();

 

and works.

 

i want able convert actionscript. when have this:

 

public var userservice:userservice; public var responder:callresponder; 

 

public function init():void{            userservice = new userservice();      responder = new callresponder();      responder.addeventlistener(resultevent.result, result);      responder.addeventlistener(faultevent.fault, fault);       responder.token = userservice.getusers(); }  protected function result(evt:resultevent):void{                 trace(responder.lastresult);  } 

 

it returns user object, values null? doing wrong?

if use mxmlc option –keep-generated-actionscript, can see how gets set up.

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