You might need to contact the site owners about that as they should know the details of the web services they are using. Just be sure you are registering with your exact Combine handle and e-mail address.
They return no or faulty information, the following I got on IRC:
<Gawayne> odd thing is, i'm pulling the wsdl into my cache ...
<Gawayne> just nothing's returning on the function calls
<Gawayne> err, that's not entirely right
<Gawayne> it's returning something, but:
<Gawayne> Error: Response not of type text/xml