ASP.NET WebService called from VB6 Client

[Graeme Anderson]

Hi,

I have a webservice written in ASP.Net which returns to calling clients one
or more files in zip format. The application works a treat with a .NET test
client but my target audience is for VB6 users.

I use Soap 3.0 and msxml 4 from vb6.

I can trace into the webservice when running the VB6 code no problems and it
does everything expected until the attachments are returned to the vb6
client.

The message is
*********************************************
SoapMapper:Restoring data into SoapMapper ReturnFilesResult failed
HRESULT= xxxnumbersxxxx The parameter is incorrect.
- Client : Unspecified client error .....
*********************************************

Here is a code snippet:
soapTestURL.MSSoapInit2 sWSDLURL, "", "DataPump", "DataPumpSoap", ""
Dim ReturnFilesResult As MSSOAPLib30.ReceivedAttachments30
soapTestURL.ReturnFiles skey, "File234.zip", "FredSmith",
ReturnFilesResult

I have modified the wsdl file to ensure it meets the correct format.

Any suggestions?

regards
Graeme