My ogg file is not read on the server by Symfony

My ogg file is not read on the server by Symfony

In my Symfony(1.4) project, I have an ogg file that is supposed to load on
one of the pages (on Firefox, or Chrome) using HTML5 audio tag. Whenever I
load the page Symfony gives this error: "Empty module and/or action after
parsing the URL..."
As far as I understand, the problem has to do with Symfony. Either my
Symfony code has a problem with ogg files or the way it should parse their
paths. Can anyone guess what can be the source of such a problem?
Notes:
The problem is not with the file because it loads perfectly when I store
it on another server and load it from there.
The problem is not with the server (MIME types, etc) because the file
loads perfectly when I enter the full URL for the file in my browser.
Additionally when I try to load the file in a page on the server outside
of my Symfony project, it works.
The problem is not with the way I've typed the address of the file or its
permissions. There's also an mp3 file in the same directory with the same
permissions that loads perfectly on Chrome.
The problem, if it has to do with Symfony, is not very general because
again the mp3 file which is in the same directory works fine.