BuddyPress.org

We are trying to set up a main site powered by wordpress, and a secondary one with buddypress. We got to use WordPress MultiSite just fine, and were able to set up Buddypress to work with the secondary one. However, after activating it, we discovered the following:

On the secondary site, we get the following on the blos tab:
http://prssamembers.freehostia.com/wp/testmp/blogs/

Secondly, on the admin dashboard it is impossible to create posts or pages since you get a 500 Error.

Also, attempting to edit a profile or clicking to go to settings always sends you to the members tab.

We have WordPress 3.0, and have tried using Buddypress version 1.2.5.2 and the trunk version 1.3-bleeding. Both present the same issue.