nsi=new NetSessionInterface();
        nsi.addEventListener(NetSessionPresentEvent.NETSESSION_PRESENT, onNSIPresent);
        nsi.check(); }
        
        private function onNSIPresent(evt:NetSessionPresentEvent):void {
            nsi.removeEventListener(NetSessionPresentEvent.NETSESSION_PRESENT, onNSIPresent);
            if (!evt.available)    {
                trace("we don't have NetSession (NS)");
                nsi.download(); 
                 nsi.addEventListener(NetSessionPresentEvent.NETSESSION_PRESENT, onNSPresentLater);
                nsi.check(35);     }
            else if (evt.available){
                trace("we have NS");
                nsi.addEventListener(ClientAttributesEvent.CLIENTATTRIBUTES_EVENT, onAttributes);
                nsi.requestClientAttributes();
                nsi.addEventListener(PerformanceAttributesEvent.PERFORMANCEATTRIBUTES_EVENT, onPerf);
                nsi.requestPerformanceAttributes();    } //fi
        } //()
        
        private function onNSPresentLater(evt:NetSessionPresentEvent):void{
            if (evt.available)    {
                nsi.removeEventListener(NetSessionPresentEvent.NETSESSION_PRESENT, onNSPresentLater);
                trace("now we have NS");    } //fi
        } //()

        private function onPerf(evt:PerformanceAttributesEvent):void{
            trace('onPerf', evt.cpu);}
    
        private function onAttributes(evt:ClientAttributesEvent):void{
            trace('onAtt',  evt.peerUploadRatio, evt.shareRate, evt.uploadPauseUntil, evt.version);}