Hey Stefano, good morning,
first i used the free version with the the pro plugins. 1hour ago i found the newsletter pro download on your downloadpage. had just overlook it. download & install it. argh. with the newsletter pro come some php errors & the facebook configuration was missed. now i deactivate the pro and activate the free version. you can take a look. your link is working but the {facebook_url} bring a 404. Thanks a lot for your support