Cannot use database

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http://snzg.net/forum/profile.php?action=show&skinco=green&username=%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%EF%BF%BD%CD%B7%EF%BF%BD

MySQL Server Error:
Access denied for user 'hdm721887579'@'%' to database 'hdm721887579_db' ( 1044 )

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http://www.phpwind.net