Problems with PHP upload to symlink

I have a php script web form that uploads a single file to the web server which works fine when uploading to normal directory on the web server. When I try to upload to a symlink created in the web directory which links to outside the web directory it doesn't work. Here is the line I use to copy a file: exec("cp $sound /home/html/sounds/uploads/$sound_name"); The "uploads" directory is a symlink to: /usr/storage/uploads I have follow sysmlinks enabled in the browser and I can browse to the symlink with no problem. Why can't I upload to the symlink? I use the latest Apache with PHP-3.0.16 and Linux