[Plugin: WP jQuery Lightbox] Two images, Only one appears in Lightbox

I am using wp-jquery-lightbox version 1.3.3 on WP 3.2.1.

In my posts, I typically have two images with one set as Featured Image before inserting into the post. http://baseballisms.com/jim-fregosi-1978-pirates.html

The situation I am having is that the secondary image appears perfectly via Lightbox, but the Featured image does not.

I cannot even insert a direct link to the image in the Image properties box. It works on the secondary image, but not for the Featured Image.

Am I missing a setting somehow?

http://wordpress.org/extend/plugins/wp-jquery-lightbox/