Is this a Custom Install, or Simple Install. Or Apps?
I’d first try the phpMyAdmin interface at the hostname of your database, such as mysql.dtippetts.com (I’m just guessing at the host name). Check the DreamHost panel for MySQL Databases to see the hostname, username (and password) your WordPress is supposed to be using. If you can connect to phpMyAdmin with your web browser, then it could be that your wp-config.php file has incorrect info for your database connection.