You have a Javascript error on that link.
Fatal error: Uncaught exception 'Swift_RfcComplianceException' with message 'Address in mailbox given [buzztone] does not comply with RFC 2822, 3.6.2.' in /home/apprenti/public_html/wp-content/plugins/cimy-swift-smtp/Swift/lib/classes/Swift/Mime/Headers/MailboxHeader.php:352
Stack trace:This is most likely due to a Javascript conflict with either your current WordPress theme or one of the other plugins you are using - see Solving CF7 Javascript Conflicts.
Use Firebug or Chrome Dev Tools to examine Javascript conflicts in detail - see Use Firebug or Chrome Dev Tools.