Forum [function.require] error
 

Warning: require_once(/home/acf/web/includes/init.php) [function.require-once]: failed to open stream: Permission denied in /home/acf/web/global.php on line 20

Fatal error: require_once() [function.require]: Failed opening required '/home/acf/web/includes/init.php' (include_path='.:/usr/share/pear:/usr/share/php') in /home/acf/web/global.php on line 20

What is the problem? I had changed the admincp to 644 but I've chenged it back and it doesn't seem to make any difference.