Error establishing database connection

I’m getting the page that says:
This either means that the username and password information in your wp-config.php file is incorrect or we can’t contact the database server at localhost. This could mean your host’s database server is down.

https://support.webhostingpad.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=36

didn’t seem to help.

I’ve tried mydomain.com, https://mydomain.com, localhost, the FTP hosting IP address I got from WebHostingPad when I registered, 127.0.0.1 just to give myself some time to think, and probably a couple others I forgot. I’ve tried moving the install around as well. I’ve checked the user and dbname over and over, too.

I even tried using both WordPad and Notepad, saving it as UTF8.

The hostname I type in always shows up on the error page.

I looked, too, and couldn’t find any good posts here related, either. I am stumped.

Here’s what I have (the domain is futuregramma.net, the user is just ‘dev’, and I’ve substituted the password):

/** The name of the database for WordPress */
define('DB_NAME', 'futuregr_wp');

/** MySQL database username */
define('DB_USER', 'futuregr_dev');

/** MySQL database password */
define('DB_PASSWORD', 'Password');

/** MySQL hostname */
define('DB_HOST', 'localhost');

/** Database Charset to use in creating database tables. */
define('DB_CHARSET', 'utf8');

/** The Database Collate type. Don't change this if in doubt. */
define('DB_COLLATE', '');

Thanks ahead of time.