URL Of Servlet In AC_FL_RunContent?

The instructions I read for using AC_FL_RunContent, say to leave off the file extension of the swf file, e.g.: AC_FL_RunContent(..., 'movie', 'some'); So that it will embed some.swf. However, I need to serve the swf from a servlet, e.g. /blah/SomeServletName. How can I do that? I tried changing the javascript of AC_RunActiveContent.js, so it doesn't manipulate the file extension. In other words, so I could use:

AC_FL_RunContent(..., 'movie', 'some.swf'); But, it displays nothing if I use the servlet path, instead of a path that looks like a file name, e.g.: AC_FL_RunContent(..., 'movie', '/blah/SomeServletName');