I have WP 3.1.1 and PHP5. I use Twenty Ten. My only other plugin is Simple Facebook Connect. I configured everything right. The first thing I notices is on the plugin screen I only see plugins for base, comments and the follow widget. In the widget section there is only 1 widget. When I apply the widget, it says @user doesn't exist. But I configured everything exactly as stated and I read the readme.
On the blog there are no buttons either. No tweetmeme or anything. The files appear on my server but they do not appear on the theme.