ActionScript 2.0 :: Loading Multiple Jpgs Dynamically With LoadMovie And MovieClipLoader

I'm loading multiple instances of the same jpg dynamically to my swf. It works just fine locally, but when I upload it, it only executes the first loading code it encounters in the timeline. I was doing things fairly complexly with 'for' loops and dynamic name generation and stuff, but I've stripped it down to the basics in an effort to get this to work.

Here's some code:

loadMovie('1.jpg', mc1.empty_mc);
loadMovie('1.jpg', mc2.empty_mc);
mcLoader.loadClip('1.jpg', mc3.empty_mc);
mcLoader.loadClip('1.jpg', mc4.empty_mc);
mcLoader.loadClip('1.jpg', mc5.empty_mc);

as you can see, I'm using two different methods of loading the jpgs, just in an effort to pin down exactly what is going on. Locally, they all load fine. When I upload to the server, only the first instance of the loading code is run (so mc1 will get its jpg, but the rest won't). I've tried to swap the order, place the loading code in different areas, try to load different jpgs into each empty mc, but nothing works except that first instance flash gets to in the timeline.

The swf and jpgs are all in the same folder, both locally and on the server. The server the swf is hosted on is Windows 2003 box if that matters. I tried uploading it to a different windows box and got the same problem.