Hi Frank,
Not sure why the box isn’t being triggered. I can see the scroll triggered box showing up in your page source, the only strange thing I can see is that there is some strange content inside the box, loading some Wysija (Mailpoet) scripts.
<p><!--START Scripts : this is the script part you can add to the header of your theme--><br />
<script type="text/javascript" src="http://www.carrington-brown.com/wp-includes/js/jquery/jquery.js?ver=2.5.9.2"></script><br />
<br />
<script type="text/javascript">// <![CDATA[
var wysijaAJAX = {"action":"wysija_ajax","controller":"subscribers","ajaxurl":"http://www.carrington-brown.com/wp-admin/admin-ajax.php","loadingTrans":"Laden..."};
// ]]></script><script type="text/javascript" src="http://www.carrington-brown.com/wp-content/plugins/wysija-newsletters/js/front-subscribers.js?ver=2.5.9.2"></script><br />
<!--END Scripts--></p>
Did you add that to the box yourself?
