Can't see any media?

I cannot see any of my media. There are placeholders for each image, and the image information shows up in the Media Library…but cannot see any of the thumbnails, or the images on the site. The site is not up publicly…I am using WP All in One Security to block it while working on it. Also using Genesis and Foodie Pro theme.

It all worked when I first put it up, but suddenly…no images.