Some image files not rendering

[hannab]

Hi,
on this site: http://streaming.probeinfo.com/wordpress/
the slider images are not showing up — you can see in the code that they are "there" but they are not visible.

I've set up the Genesis slider "20 times" before on other sites and never had this happen. The images are indeed in the Media Library so I know they are there (see attachment).

I've tried uploading the images to each post both via direct upload and direct from the Media Library but they still don't show up.

Please help — what did I do wrong?

The site is hosted on the clients own server, if that has anything to do with anything...

Thanks!
Hanna in Tahoe