downloaded wav file does not play

[ILOVEUM3]

I have a page w/ a Download button to download a .wav file. I used only the following code:

header("Content-type: audio/x-wav");
header("Content-disposition: attachment; filename=".$filename);
header("Content-Transfer-Encoding: binary");
readfile($file);

The wav file is successfully downloaded but does not play; default player says "unsupported format". The downloaded file size is also correct. What could be wrong?

Thanks in advance for any tip/help.

[NogDog]

I doubt that it will make a difference, but I believe the file name is supposed to be quoted:

header('Content-Disposition: attachment; filename="'.$filename.'"');

[etully]

EDIT: sorry, wav looked like wmv on my screen.

<gilda-radner>Nevermind</gilda>