Re: No authorization Buddypress – WordPress 3.0
You may need to explain things in greater detail. Installed WP? and could you login in to the backend? before any plugins were uploaded; or had you managed to activate BuddyPress?
The error message you are getting is covered quite a few times on WP forums and the issue stems from WP rather than BP so you may like to look through a few of these threads for solutions?