clicking on (i) does not bring up vote details

[costumecontest]

Running a costume contest and when I am on an image, clicking on the (i) button to Display/hide file information to see the details of the votes does nothing. I have "Keep detailed vote statistics" set to Yes. And even if I have the config set up so the information automatically displays on the page (which I don't want on), when i click on (details) nothing happens. Doesn't work in IE and in Firefox, the error says "blocking is not defined." This is my first stab at php, so might have inadvertently messed something up without knowing. Thanks for any advice!

Here is the site and a log in. 

site: http://www.dvdhalloween.com/costumecontest/index.php
login: guest
pword: fortesting

[Nibbler]

http://coppermine-gallery.net/demo/cpg14x/docs/faq.htm#noFullsizePopup