Hi digger thank you for the response. I indeed own the webservice and I can use the SOAP::Lite to interact it.
Here is one scenerio I tested:
Javascript triggers the login webservice, user logs in, then javascript calls a Perl code which triggers another webservice via SOAP::Lite.
The webservice checks the session to see if the user is logged in, and returns FALSE to Perl. But the user has just logged in!
The .NET session seems to have an organic connection with the user agent. When I show our CGI::Session to the C# folks, they just stare at the monitor. hehehe...
BUT when the webservice call checks whether the user has logged in or not via the session, I always get false.