Warning: Failed opening '/include/mysql.php' for inclusion (include_path='.:/usr/local/lib:/home/korlang') in ../include/global_define.php on line 536

Warning: Failed opening '/community/main/header_install.php' for inclusion (include_path='.:/usr/local/lib:/home/korlang') in /home/koreanlanguage/nbuilder/install/index.php on line 29

위와 같이 나오는데 이유가 뭔지요?