Consuming a sharepoint webservice

Hi there.

I’m new to webservices and the web service consumer in notes 8.

I’m trying to consume a sharepoint webservice and the developer assures me the wdsl is valid but when I try and create the web service consumer I get the error ‘no wsdl was returned from the url’

Does anyone know if there are security settings that may need to be addressed (domino or sharepoint) for this to work ?

thanks in advance