Product Images Broken?! Help!

On my site (www.jewelsbymr.com/store), I have one section which for some reason has multiple broken images (default product images). It's the "Endless Diamonds" link off the left frame toward the top of my page.

I've tried a few things..keep in mind, these images DID work when I originally set up the products. I tried deleting the entire item & re-adding it, changing the image back and forth, deleting and re-adding the image files directly on the server, changing the image to "no image available" and then changing it back. I've also tried re-saving the files under different names on my computer and uploading THOSE, all to no avail - on certain model numbers, there is NO getting an image to work! Any ideas??

A couple of model numbers for example are FAN-10015, FAN-10099, FAN-10012. (which can also be found through the search toolbar).

Any help is greatly appreciated!
:blink:

Let me add - now I'm trying to add new products (to the same category), and new images which have never been used, and that's not working either.