Cannot use database

The URL Is:
http://bbs.98750.com/u.php?action=show&username=%C5%B7%D1%F4%C0%CF%C5%A3

MySQL Server Error:
Access denied for user 'xnbbs_f'@'10.133.211.91' (using password: YES) ( 1045 )

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http://www.phpwind.net