Argh!

define('DB_NAME', 'XXX');    // The name of the database
define('DB_USER', 'XXXX');     // Your MySQL username
define('DB_PASSWORD', 'XXXXX'); // ...and password
define('DB_HOST', 'localhost');    // 99% chance you won't need to change this value
define('DB_CHARSET', 'utf8');
define('DB_COLLATE', '');

I can't get my wordpress to work. I have tried it all, but no matter what i change in the config i alwas get the error message. What am i doing wrong?
Can someone post an example?

Thanks