Mark Senff on "WP-CONFIG Not updating with host name"

So you updated the database host from:

define('DB_HOST', 'mysql6.namesco.net');

...to something else, but the error message is still the same?

Make sure there is not another line in that file that still points to mysql6.namesco.net, and of course make sure you're uploading the wp-config.php file to the correct directory.