Wordpress isnt loaded after changing MySQL password?

Hi everyone,

I just changed mysql password of db user (in wp-config file) I tried with both ways: admin tool, sql command with PASSWORD(‘mypassword’) then after that my wp doesnt work anymore. It said as the following quote So what is the problem and how can i fix it? Thank you.

<?php
/**
 * Front to the WordPress application. This file doesn't do anything, but loads
 * wp-blog-header.php which does and tells WordPress to load the theme.
 *
 * @package WordPress
 */

/**
 * Tells WordPress to load the WordPress theme and output it.
 *
 * @var bool
 */
define('WP_USE_THEMES', true);

/** Loads the WordPress Environment and Template */
require( dirname( __FILE__ ) . '/wp-blog-header.php' );