Problem loading .swf as header

I am trying to load a .swf as my header in a pre-made wordpress template. The problem is that the header.jpg is in the main CSS not the header CSS. How would I fix this? The current code is:

background:url(images/header.jpg) top left no-repeat;

I have tried replacing that file with a .swf file but that doesn’t seem to work. Any thoughts anyone?

http://jessejonesonline.com/brewhouse/