Shadowbox not working on new pages

Basically, Shadowbox works great. I did the initial setup just fine, installed Shadowbox and it works wonderfully.

However I added some new pages with images. Did the thumbnails, and then just did a link to the full image. Before, Shadowbox would automatically insert itself to do its thing. Now, it doesn't do anything on these new pages!

Why is that? Thinking it was cron, I ran that manually but there's still nothing...

All the pre-existing stuff still works. The new pages don't give the effect. I click on the image but it just goes to your basic image page.

Any ideas?