We were able to connect to the MySQL database server (which means your username and password are okay) but not able to select the database.
The MySQL error was: Access denied for user 'db37947'@'%' to database 'db37947_mma'.
Currently, the database is db37947_mma. The username is db37947 and the database server is internal-db.s37947.gridserver.com.
For more help, see the Installation and upgrading handbook. If you are unsure what these terms mean you should probably contact your hosting provider.