Thread:Extension talk:FancyBoxThumbs/The image's box never displays, just new page with image

I've installed FancyBoxThumbs-0.4 onto Mediawiki 1.16.2, and am not seeing the same behavior as I see on the example page for this extension. The example page works on all my browsers but my wiki does not. When an image is clicked instead of a box, or even that image's wiki page, it just shows a blank page with that image. I've watched the Apache error logs and have seen nothing related to this, and as far as I know I don't have any other JQuery extensions enabled. Any ideas are greatly appreciated.