Using post to test user login

        Hi all - I ran into a challenge and was wondering if anyone

else had seen it and found a workaround. I'd like to use the "post" function of the HTTP test to verify a web page that does user authentication for an application. The way the login works is:

•      User enters login details on a web form

•      The user is sent to a "middle" page while authentication is

  done

•      If authentication is successful they are redirected into the

  web application, otherwise they redirect to an error page

When using the post check I can only get to that middle page, which doesn't tell me if authentication was correct or not. The reason for the middle page is that this web site is using SSO authentication against an external LDAP system. We'd need to be able to get to the page that the redirect pushes to. Does anyone know if there is a way around this? My first impressions would be no, but I thought it wouldn't hurt (too much!) to ask.

Thanks!

Shawn