SoapUI w/ASP.NET and "415 Unsupported Media Type"

Hi All,

I'm trying to connect to a site that's running a ASP.NET server using SoapUI and no matter what I try, the only response I get back is:

HTTP/1.1 415 Unsupported Media Type
Connection: close
Date: Thu, 19 Sep 2013 15:17:25 GMT
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
X-AspNet-Version: 2.0.50727
Cache-Control: private
Content-Type: text/html


Their URL is:

https://webedi.flmmis.com/EDIInterface/ ... rvice.asmx

If I slurp in their WSDL, choose "EDIFIleServiceSoap12", choose either "AuthenticateandDownload" or "AuthenticateandUpload" Request 1, add in a custom Header of "Content-Type" and "application/soap+xml" and submit the request to the end point... the message above is all I can ever get. Even if I fill in all the need username/password creds etc... (which we do have) doesn't matter: I get the same results every time or "HTTP/1.1 415 Unsupported Media Type".

The URL's:

https://webedi.flmmis.com/EDIInterface/ ... eandUpload
https://webedi.flmmis.com/EDIInterface/ ... ndDownload

.. show sample SOAP messages. Even if I cut-n-paste these into SoapUI and again fix up a custom header with the content-type I get the same 415 error.

Does anyone have any ideas what I might be missing?

Thank you *so* much for pondering this... about ready to throw my computer out the window!