Problems with OpenSSO, webagent & AuthenticationModule BasicAuth

Hello Wizards!

I am using "Movable Type version 5.04".

We have an OpenSSO installation. We have an apache 2.2.17 installation with the OpenSSO webagent. What the webagent does it hijack the apache auth system and make everyone authenticate with OpenSSO (tokens).

It passes the logged in username to the apps in the $REMOTE_USER variable. I can also configure it pass additional information via environmental variables if needed.

OK, now on a separate server, with no Open SSO, we have a working mt5 installation. I am trying to move the working installation to the openSSO apache2 server.

My login name on the working system is "warren". I can login fine with my username and password.

As soon as I move the mt5 to the new web-server, edit my mt-config.cgi config, and add "AuthenticationModule BasicAuth", I can no longer login. (The login page says "Invalid login.")

I have verified the webagent module is working properly (TWiki & Bugzilla are working fine), and is passing the REMOTE_USER variable. I have also confirmed that the value of the REMOTE_USER variable is my valid login "warren".

Is there some special procedure to migrate from using local users to using BasicAuth that I just didn't find?

Thanks,
Warren