Slider does not work

Hello,
We are trying to implement the slider on one of our product pages, however when we select the ‘slides’ option, nothing displays. If we select it to display a single product, it works fine. But we really need to make use of the ‘slider’ functionality.

Example page:
http://invitinghome.dandelionspell.com/product/dundee-decorative-panel-molding/