Hi when i click on the foum icon in the admin section i get errors.

Warning: Failed opening './../config.php' for inclusion (include_path='') in /home/hui/public_html/html/modules/Forums/common.php on line 129

Warning: Cannot add header information - headers already sent by (output started at /home/hui/public_html/html/modules/Forums/common.php:129) in /home/hui/public_html/html/modules/Forums/common.php on line 133

what is wrong?