Popup Pro not working in ie and firefox

Hello,

I am currently using Popup Pro to load formidable forms on my site with a button click based on a css id. The only setting that loads the formidable form is the custom AJAX option.

This setup works perfectly on Chrome, but in IE and Firefox the button click does not open the form at all.

Quick videos of what happens:
Chrome: http://screencast.com/t/2pQ508QA6Gz
Firefox: http://screencast.com/t/rnJQZGcaK
IE: http://screencast.com/t/fCtFCmWD
Opera: http://screencast.com/t/vVqJUlhiE7k

Here is the link used in all the tests above: https://www.ereika.com/hub-offer-2015/