php_security.php error

[xfx]

Your phpBB Version: 2.0.
phpBB Type: Standard phpBB
MODs: No
Your knowledge: Beginner
Board URL: [url]http://[/url]

PHP Version:
MySQL Version:


What was done before the problem appeared?



What was done to try to solve the problem?




De.scription and Message

I've got this error when I load my site:

Warning: system() has been disabled for security reasons in /www/110mb.com/f/a/c/o/o/l/_/_/facool/htdocs/portal/includes/phpbb_security.php on line 1195

what that means? and how can I solve?

tnks in advanced