I need to pass a URL on Click in Flex...

Question

My situation is i am generating XML using PHP, on every delete i will be getting the XML updated which will be shown in TREE in Flex.

Now when i use this, it does not call the PHP page to update the XML.

<mx:HTTPService id="theUrl" url="http://localhost/file.php"
            resultFormat="e4x"

            result="httpService_result(event)" />
<mx:XMLListCollection id="xmlListColl" />

theURL.send() which resides inside the delete function.