[CentOS] Strange thing with Apache and PHP

Hi,

I have this line (10) of code in PHP: include_once('../config.inc.php');

I'm 100% sure that the file config.inc.php is a directory up.

config.inc.php is in /var/www/html and the file that calls it is in /var/www/html/classes

nevertheless, i'm getting the error: "Warning: main(../config.inc): failed to open stream: No such file or directory in /var/www/html/classes/dBInsert.php on line 10

Warning: main(): Failed opening '../config.inc' for inclusion (include_path='.:/usr/share/pear') in /var/www/html/classes/dBInsert.php on line 10"

Permissions and ownership are ok.

I even set: include_once('/var/www/html/config.inc.php'); and nothing :(

I'm boggled!

Any help would be appreciated.

Best Regards, Deckard