ERROR 256: DB connection error in PGV_DB::createInstance(): SQLSTATE[HY000] [1044] Access denied for user 'dazupu_qian'@'localhost' to database 'dazupu_qian'

Fatal error: DB connection error in PGV_DB::createInstance(): SQLSTATE[HY000] [1044] Access denied for user 'dazupu_qian'@'localhost' to database 'dazupu_qian' in /data/www/PGV/includes/classes/class_pgv_db.php on line 405