After my website became very slow (loading times over 14 seconds), I installed W3 Total Cache and my website became a lot faster (4 seconds). But now the image slider on the homepage doesn't work anymore. It keeps loading, but nothing is shown. It's a theme from Elegantthemes, here: Professional.
This is my website: webguideict.com (Text in Dutch.)
What can I do to fix the image slider?