关于权限设置Discuz出错的问题

Warning: require_once(./include/common.inc.php) [function.require-once]: failed to open stream: No such file or directory in F:\webserver\index.php on line 12

Fatal error: require_once() [function.require]: Failed opening required './include/common.inc.php' (include_path='.;C:\php5\pear') in F:\webserver\index.php on line 12



我设置了目录权限，就变成这样了，不清楚是那个目录的权限问题，望大家指点！