WordPress MU

Hi,
we have installed Wordpress CAS plugin http://wordpress.org/extend/plugins/cas-authentication and configure it, but when we login to Wordpress via CAS, the address is still ....wp-login.php?ticket=ST-1596-RGYJqx9q0b31eNkKk6ZrL1qklmCu94hi4XE-20 and it doesn't change, it doesn't redirect to wp-admin/index.php page.

Are there any suggestions?
Other issue is, can we use this Plugin for WP-MU user authentication?

Thanks,

I'm also having the same problem. The site looks like it doesn't work after 2.3... I hope there's an update planned, but the author has no contact info so I have no way to ask.