as3 CS4 web service

programming flash
1

Welcome,
I have a problem with using the webservice component from flex 3 in flash cs4.
I am making the same thing what is in this adobe tutorial:
http://www.webkitchen.be/2009/03/02/…-cs4-projects/


public function Main() 
        {
            _WS = new WebService();

            _st = new String("http://www.webservicex.net/country.asmx?WSDL");
            
            _WS.addEventListener("load", wsLoaded);
         
        }
        
        private function Klik(e:MouseEvent):void 
        {
            _WS.loadWSDL(_st);
        }
        
        public function wsLoaded(e:LoadEvent):void 
        {
            
            _myOperation = Operation(_WS.getOperation("GetCountries"));
            _myOperation.addEventListener("fault", wsError, false, 0, true);
            _myOperation.addEventListener("result", wsResult, false, 0, true);
            _myOperation.send(); 
            
        }
        
        public function wsResult(e:ResultEvent):void 
        {
            var xml:XML = new XML(e.result);
        }
        
        public function wsError(e:FaultEvent):void 
        {
            trace(e.fault);
        }

And I’m getting tis Error:
Error opening URL ‘http://www.webservicex.net/country.asmx?WSDL’

If i open my swf in browser everything is fine.
Is ther something that can block the communication ?
Thanks.