Flex WebService and HTTPService Result Event not firing when created programmatically.

// Programmatic declaration

public class ServiceProxy
{
private var service:WebService;

public function ServiceProxy(){

service = new WebService();
service.wsdl = "http://www.domain.com/service.asmx?wsdl";

// used for authentication
var qname:QName = new QNAME("http://www.domain.com/", "Header");
var header:SOAPHeader = new SOAPHeader(qname, {});
var content:XML = <AuthHeader insert xml here </AuthHeader>;

header.content = content;
service.addHeader(header);

// add the event listener
service.addEventListener(ResultEvent.RESULT, serviceResultHandler);
}

private function serviceResultHandler(event:ResultEvent):void{

}

public function runService(value:String):void{
service.methodName(value);
}
}



// mxml declaration

<s:WebService id="service"
 			wsdl="http://www.domain.com/service.asmx?wsdl"
			result="webservice1_resultHandler(event)" />

protected function webservice1_resultHandler(event:ResultEvent):void{
}

protected function button_clickHandler(event:MouseEvent):void{
var qname:QName = new QName("http://www.domain.com/", "Header");
var header:SOAPHeader = new SOAPHeader(qname, {});
var content:XML = <AuthHeader xml goes here </AuthHeader>;
				
header.content = content;
service.addHeader(header);
service.methodName(value.text);
}

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