Media files appearing as question marks?

This issue is only with my previously uploaded media files. Ive uploaded photos and they appear in my media library. But ALL of my previous media files are a question mark. I click on it through media library and still the blue question mark. Ive deactivated all my plugins. What could possibly be happening?

I have the showit plug in for my website. Its hard to believe its a plug in because the recent files are showing up – go to blog, and click the latest post and you’ll see the images.

I REALLY don’t want to have to re upload thousands of photos and re do hundreds of blog posts.

The page I need help with: [log in to see the link]