[Plugin: Shadowbox JS] not working

Hi there—

Here’s the site that I’m trying to get it to work on:
http://locktheknee.com/NEW/about/ (single image)
http://locktheknee.com/NEW/about/studio-tour/ (gallery)

I’ve scoured Google and the WP forums, and have tried everything I could find:
– changing template to default (twentyten), to rule out template conflicts
– deactivating all plugins to rule out conflict
– reinstalling plugin/resetting default parameters

All results are the same: images open in browser window rather than shadowbox. I’ve used this awesome plugin on many many sites and this is the first time I’ve had an issue! D:

All the coding seems to be in place. I’m stumped..? I’m sure it’s something totally stupid and easy, so I’m hoping someone smarter than I will spot it!

Thanks in advance 😀