Cannot use database

The URL Is:
http://ourjg.com/bbs/u.php?action=show&username=%E5%AF%8C%E5%AF%9F%E9%98%BF%E6%9E%97

MySQL Server Error:
Unknown MySQL server host 'dbhost' (1) ( 2005 ) 查看错误相关信息

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http://www.phpwind.net