window title of download status showing php file instead of downl oad file -- header() issue?

Hello. I have a php script that I'm using to download files off my server. It works fine and all, but when I'm downloading a file, the title of the little download progress window says: "Downloading x% of script.php" instead of "Downloading x% of filebeingdownloaded.mpg" Now this is the window TITLE (the blue bar at the top of IE). The context of the window does show the proper filename and the progress, etc. But how do I fix that annoying title bar issue? I can't find a header() statement to do the trick. Anyone know how to resolve this? Many many thanks, Michael