Oops! From the Spam page ( http://wordpress.org/support/bb-admin/admin-base.php?plugin=bb_ksd_admin_page ): The API key you have specified is invalid. Please double check the $bb->akismet_key variable in your config.php file. If you don't have an API key yet, you can get one at WordPress.com <http://wordpress.com/api-keys/>.