SOAP on Windows Server

Does anyone know what this error is:

HttpSOAPCallerBadInputStream ?

The code is -

Code:

---


    Dim Serializer As SoapSerializer30
    Dim Reader As SoapReader30
    Dim Connector As SoapConnector30

    .
    .    ' Setup the connector and serializer and add the XML msg
    .

    Connector.EndMessage
   
    ' Get the returned string
    Set Reader = New SoapReader30
    Reader.Load Connector.OutputStream

---

Reader.FaultString.Text = "HttpSOAPCallerBadInputStream"

I'm using SOAP Toolkit 3.0. The code works fine on Windows 2000 SP2 but not on SP3 or 2000 Server. Is this related to winHTTP/winInet?