Problem with post and login

Hi!

I’m having a problem with the plugin. When I log in as an anonymous user, after the forum thread that can be seen after the WordPress article, there’s absolutely no option whatsoever to connect in any way, be it with Facebook or anything else, it just says that you “have to login”.
What am I missing? Do I need to edit something to add a login option?

Thanks in advance.

http://ww.wp.xz.cn/plugins/bbpress-post-topics/