changing header graphic in mx4 theme

I am trying to change the header graphic in the mx4 theme. The only place that I can find reference to change the name of the file is through CSS in the header file. The problem I have been running into is changing it from a regular image to a flash file.

This is the line of code that references the header image:

#header { background: url(“<?php bloginfo(‘stylesheet_directory’); ?>/images/kubrickheader.jpg”) no-repeat bottom center; }

What do I change this to so that it properly displays a .swf file?