Web Service Clients and Authentication?

Hi Everybody,

I'm trying to use WebDynpro to invoke a Web Service that requires authentication. I've created a model based on an imported WSDL and I've created a very simple gui to invoke the Web Service. However, as I would have expected I receive a security exception. I tried turning on authentication hoping that the userid/password would be passed along but this doesn't help.

Has anybody been able to invoke a Web Service using the model generated by Netweaver Developer studio when authentication has been required?

Thanks alot,

...Scottd