BuddyPress.org

@drmunden Like @claud925 said, it’s probably a permalink issue. What are your settings at Dashboard > Settings > Permalink? BuddyPress will not work with permalinks set to the default option. On your live server, do WP pretty (ie non-default) permalinks work without BP activated? If not, it’s likely that your host does not have the proper modules to allow for permalink rewrites, and you should contact them to ask whether they can enable it.