unable to run install script-please help!

This is the error I receive when running the install script for new-homes-loudoun-county.com/blog/wp-admin/

Error establishing a database connection

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.

* Are you sure you have the correct username and password?
* Are you sure that you have typed the correct hostname?
* Are you sure that the database server is running?

The db installation was successful and I edited the wp-config file to display the below:

<?php
// ** MySQL settings ** //
define(‘DB_NAME’, ‘name_blog’); // The name of the database
define(‘DB_USER’, ‘name_lenn’); // Your MySQL username
define(‘DB_PASSWORD’, ‘password’); // …and password
define(‘DB_HOST’, ‘localhost’); // 99% chance you won’t need to change this value

Please advise
Thanks