[問題]phpbb2.0.6的問題！

[fenky]

各位大哥：
小弟以前自己曾經解決過這個問題!
但是我忘了要怎麼解決!?

Warning: file_exists() [function.file-exists]: Unable to access in /var/www/html/phpBB2/includes/functions.php on line 329

Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/phpBB2/includes/functions.php:329) in /var/www/html/phpBB2/includes/page_header.php on line 474

Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/phpBB2/includes/functions.php:329) in /var/www/html/phpBB2/includes/page_header.php on line 476

Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/phpBB2/includes/functions.php:329) in /var/www/html/phpBB2/includes/page_header.php on line 477
就是這些東東~~~我知道一定是mysql的問題!?....但真的忘了~~~~~
誰能夠告訴我呢？