Moderation plugin is not working with wpmu 2.8.4a

Moderation plugin is not working anymore for wpmu 2.8.4a! When you click on report this post in a blog's post, the ajax popup effect only show empty white blank box! Testing can be done at to reproduce the same error. I had all the files in moderation plugin in the correct place: For example, I have
moderation-framework.php - goes in /wp-content/mu-plugins
moderation-admin - goes in /wp-admin/
warning.php - goes in /wp-admin/
moderation.js - goes in /wp-content/

So it must be the plugin is not working!