Database connection error when live on server (SOLVED)

I configure a VirtualBox VM for my server running UBUNTU (LAMP setup) and now after putting my project on the server it fails to connect to the database.

Error

PHP Code:

mysqli::real_connect(): (HY000/1045): Access denied for user 'usr'@'ip' (using password: YES) 


my application/config/database config

PHP Code:

$active_group = 'default';
$query_builder = TRUE;

$db['default'] = array(
    'dsn'    => '',
    'hostname' => '***',
    'username' => 'miko',
    'password' => '***',
    'database' => 'handler_monitoring',
    'dbdriver' => 'mysqli',
    'dbprefix' => '',
    'pconnect' => FALSE,
    'db_debug' => (ENVIRONMENT !== 'production'),
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
    'swap_pre' => '',
    'encrypt' => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE
); 


Anyway a simple database connection from a pure PHP works, I don't understand why CI wont.
Pure PHP connection that works on the server

PHP Code:

("127.0.0.1", "my_user", "my_password", "my_db" 


Turns out I had the wrong privileges.