Pictures of items not showing on facebook page

Love your plugin and have used your eCommerce Browser when I had a Zencart site. Everything installed properly but the pictures for each of the items is not showing up on top of the name of each items. The links work perfectly.

my facebook page
http://www.facebook.com/jolenesbooksandmore.com

my shop
http://jolenesbooksandmore.com/shoptiludrop

http://wordpress.org/extend/plugins/ecommerce-browser-wponlinestore/