PowerGallery does not display on Wordpress post
I am trying to display a PowerGallery gallery in a Wordpress post. I have installed the Exec-PHP plugin for Wordpress so that I can include PHP code in a post. What displays is the text "no images" so the PHP code is running. It must be a path issue, but I can't figure it out.
Link to the post (which has a link to the gallery displayed on a non-Wordpress page):