Trying to get simple HTTPService to work

[kamcknig]

I feel like this should be pretty darn simple. But I can't seem to get it to
work. Trying to hit a URL that will return xml. But I'm getting a
FaultEvent:

faultCode:InvokeFailed faultString:'[MessagingError message='Destination
'null' either does not exist or the destination has no channels defined (and
the application does not define any default channels.)']'
faultDetail:'Couldn't establish a connection to 'null''

I have a class SearchService that extends a BaseService class that extends
HTTPService. BaseService doesn't do much right now but add some listeners
for ResultEvent and FaultEvent and call some protected functions.

Here is my SearchService class:

package foo.bar
{
        import mx.rpc.events.FaultEvent;
        import mx.rpc.events.ResultEvent;
        import mx.rpc.http.HTTPService;
        import foo.bar.constants.ServiceURLs;
        /**
         * ...
         * @author 
         */
        public class SearchService extends BaseService
        {
                public function SearchService(showName:String)
                {
                        super();
                        
                        this.url = ServiceURLs.SEARCH;
                        this.method = "GET";
                        this.request = {
                                show:showName
                        }
                        this.resultFormat = HTTPService.RESULT_FORMAT_XML;
                        this.showBusyCursor = true;
                        this.send();
                }
                
                override protected function onResult(e:ResultEvent):void
                {
                        super.onResult(e);
                        
                        trace(SearchService(e.target).lastResult);
                }
                
                override protected function onFault(e:FaultEvent):void
                {
                        super.onFault(e);
                        
                        trace(e.fault.message);
                }
        }
}



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