Windows sharepoint integration

We are trying to connect from Servoy to the local Windows Sharepoint webservice. But the only reply I get is a 401, ‘not authorized’. The authorization for the Sharepoint server is windows authorization (the requests work from a web-browser), but I can’t figure out how to send requests from Servoy with the same credentials.
I use Servoy 6.0.8 and use the http-plugin to do the requests. The methods setClientProxyCredentials(user,pass) and/or executeRequest(user,pass) do not give any result.
Is there anyone with working solutions that use the Windows Sharepoint webservices?

i guess you need NTLM authentication
We have some basic support for that but i am not sure if that fully works, also reading this:
http://stackoverflow.com/questions/5746 … not-spnego

it seems not everything is supported or needs needs to be configured quite a bit more.