External load not working

I have a a site at http://www.zephn.com and I’ve been trying to get it to work for the longest time now and it just acts all buggy.
I have 4 buttons on the upper right corner that you click on to load a set of pictures. I have checked and rechecked each button to make sure they work the same way and everything checks out. One button works but the rest wont load their external swf. I’m not looking for an exact answer but more speculation as to what I might be doing wrong.

I should also mention that it does work on my PC but the problem occurs when the site is posted to the net.