.users/userdb.dat.0): failed to open stream

When I go to my website, I receive an error in the header. I cannot seem to correct the problem through permissions. Here is the exact errror message

Warning: fopen(/home/yourwo2/public_html/albums/.users/userdb.dat.0): failed to open stream: Permission denied in /home/yourwo2/public_html/gallery/platform/fs_unix.php on line 55

http://yourworldvideo.net/gallery
PHP Version 4.3.4
Apache version 1.3.29 (Unix)
Operating System: Linix
IE: 6.0+
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