Hello timmoz
Thank you for the link
The theme you are using does not have a footer? Therefore it does not have wp_footer(); and hence the jquery.ad-gallery.js is not included and the image cannot show.
wp_footer(): is a core function of WordPress and should be in every theme
many plugin developers load their scripts from the footer because it makes the site load faster.
It is also the reason that the Product page tabs on the site you linked to are broken – you will find many things from the WooCommerce plugin cannot work on that theme because there is no wp_footer():
timmoz – to check this for yourself – on that site chnage the theme to any of the WordPress default themes and test – you’ll be pleasantly surprised how amny things work that did not work with that theme that have no footer.
Please let me know if you have any further questions about the WooCommerce Dynamic gallery plugin – Steve