Hi Peter, I found the problem. Your HTML page uses a jQuery plugin (backgroundCanvas) that creates rounded corners and this conflicts with our embedding code. This plugin changes the DOM structure in a way that prevents Nabble from loading properly. Please go to your page and disable this plugin for the "vervolg_column" element as below:
$(document).ready(function() {
$(".div_nu").backgroundCanvas();
$(".div_wij").backgroundCanvas();
$(".div_straks").backgroundCanvas();
$(".div_jij").backgroundCanvas();
// $(".vervolg_column").backgroundCanvas(); << COMMENT THIS LINE
$(".vervolg_con_nu2").backgroundCanvas();
$(".vervolg_con_jij5").backgroundCanvas();
});
If you comment the line above out, it will work.