In 3.7.1 only one image is loaded and is highlighted on click

I tried to use it in 3.7.1 on a test install which is here:
http://boutique.citrotux.org and although I followed the doc:
http://docs.a3rev.com/user-guides/plugins-extensions/wp-e-commerce/wpec-dynamic-gallery/#section-13

I could not get it to display the four images which are loaded (which do show in the product page in the admin board).

Regards,
Mélodie

http://wordpress.org/plugins/wp-e-commerce-dynamic-gallery/