Drupal already installed

The following error must be resolved before you can continue the installation process:

Failed to connect to your MySQL database server. MySQL reports the following message: Access denied for user 'math_when_user'@'localhost' (using password: YES).
  • Are you sure you have the correct username and password?
  • Are you sure that you have typed the correct database hostname?
  • Are you sure that the database server is running?
For more help, see the Installation and upgrading handbook. If you are unsure what these terms mean you should probably contact your hosting provider.
  • To start over, you must empty your existing database.
  • To install to a different database, edit the appropriate settings.php file in the sites folder.
  • To upgrade an existing installation, proceed to the update script.
  • View your existing site.

Please check the error messages and try again.