Cannot add WSDL to new project

Hi

I am trying to test an externally hosted app. I have attached the WSDL. I am using the latest version of soapui on 64bit Windows 7.

I believe the problem to be related to the proxy.

It works OK through a 3G connection.

I have tried configuring the proxy without success (trying both DOMAIN\username and DOMAIN\\username in the username field.

I get the error: Error loading [http://schemas.xmlsoap.org/soap/envelope/]: org.apache.xmlbeans.XmlException: org.apache.xmlbeans.XmlException: error: Unexpected element: TAG_END

Any ideas what I can do from within soapui to get around our darn proxy?

Thanks

Ben