by Federico Ghigini.
Hi!
I suppose that you have installed my patch and activated it. To obtain the wsdl of all the available services (and so the one you are looking for) you have to call this url
http://your-moodle/webservice/soapfda/server.php?wsdl=1&wstoken=yourtoken
I've tested the wsdl with axis and soapui, not with a php client. Please, let me know if you have trouble.