Help with Dynamically Loaded Jpegs

I am using this tutorial to load jpegs into container mc’s
http://www.kirupa.com/developer/mx/loading.htm

The images show up on computers with flash player 8, but not on computers with flash player 7 or below.
any idea why?
and how do i make them show up in flash player 7.
thanks

maybe you exported your swf as flash 8 ?

for now I would like to keep publishing in flash 7. so i need to figure out why the pics wont showup when loaded and how to get them to load in flash 7 player