fancybox – please work on single.php!

I’ve been trying to get fancybox to work on my post page. Right now it only works on my image page.

The way is visitor navigates through my post is this:
index > post page > image page

On my post page it’s a bunch of thumbnails which link to a larger image on a different image page. I think this is redundant and would like to just have fancybox directly open up the thumbnails from my post page.

Can someone help me out? I’m using Mansion by Graph Paper Press. My blog is up here