access duty member directly

i'm building initial flex app am now bussy bursting adult churned components maintainable.
i have shade binds list displayed filled after succesfull login attempt:

part sure app:

<mx:viewstack id="vsadmin" height="100%" width="100%">
   <mx:tabnavigator id="admintabs" width="100%" height="100%" historymanagementenabled="false">
      <mycomp:compbeheerdersadmin id="beheerdersviewstacka"/>
   </mx:tabnavigator>
</mx:viewstack>

in member compbeheerdersadmin there duty requestbeheerderslist() gets information server binds list by handler.

after login following formula sure app:

mainviewstack.selectedchild = vsadmin;
//beheerdersviewstacka.createcomponentsfromdescriptors();
beheerdersviewstacka.requestbeheerderslist();

the duty requestbeheerderslist() does zero (is reached, i put warning initial matter duty nonetheless displayed) i login after uninformed bucket swf, nonetheless i logout login again, following duty reached warning displayed list filled information server.
any ideas?