MSSoap client to Apache Service Complex types

Hi all.

I'm working on an ASP page as an interface between a legacy system and a
SOAP service implemented using Apache SOAP.

I'm using SOAPClient in the ASP page (VBScript) and my first experiments
calling methods using simple data types and arrays of simple data types were
successful.

However some of the methods require (and return) complex data types
(structures) and I haven't been able to find any samples or documentation
covering MS SOAP client to Apache SOAP service communication with complex
data types.

I have no influence on the service side of the processing so IXMLNodeList is
not an option (if I understand what I've read).

I am beginning to think that my only option is to scrap the ASP approach and
implement the interface using JSP.

Can someone confirm my assumptions or point me at appropriate documentation.

Thanks

Con