[vBulletin] problema installazione

ciao a tutti ho un problema, ho cercato di installare vBulletin sul mio sito ma mi da questo errore:

Step 2) Connect to the database

Attempting to attach to database

Connect failed: unexpected error from the database.

Error number: 1044

Error description: Access denied for user 'zein'@'localhost' to database 'My_Zein'

Please ensure that the database and server is correctly configured and try again.

cosa devo fare? io ho compilato così il file config.php:

// ****** DATABASE TYPE ******
// This is the type of the database server on which your vBulletin database will be located.
// Valid options are mysql and mysqli, for slave support add _slave. Try to use mysqli if you are using PHP 5 and MySQL 4.1+
// for slave options just append _slave to your preferred database type.
$config['Database']['dbtype'] = 'mysql';

// ****** DATABASE NAME ******
// This is the name of the database where your vBulletin will be located.
// This must be created by your webhost.
$config['Database']['dbname'] = 'My_Zein';

// ****** TABLE PREFIX ******
// Prefix that your vBulletin tables have in the database.
$config['Database']['tableprefix'] = 'vb_config';

// ****** TECHNICAL EMAIL ADDRESS ******
// If any database errors occur, they will be emailed to the address specified here.
// Leave this blank to not send any emails when there is a database error.
$config['Database']['technicalemail'] = 'MIA E-MAIL';

// ****** FORCE EMPTY SQL MODE ******
// New versions of MySQL (4.1+) have introduced some behaviors that are
// incompatible with vBulletin. Setting this value to "true" disables those
// behaviors. You only need to modify this value if vBulletin recommends it.
$config['Database']['force_sql_mode'] = false;



// ****** MASTER DATABASE SERVER NAME AND PORT ******
// This is the hostname or IP address and port of the database server.
// If you are unsure of what to put here, leave the default values.
$config['MasterServer']['servername'] = 'localhost';
$config['MasterServer']['port'] = 3306;

// ****** MASTER DATABASE USERNAME & PASSWORD ******
// This is the username and password you use to access MySQL.
// These must be obtained through your webhost.
$config['MasterServer']['username'] = 'Zein';
$config['MasterServer']['password'] = 'MIA PASSWORD';


cosa devo fare?

[Gianluca]

Il nome del database deve essere my_zein (minuscolo)

grazieeeeeeeeeeeeeeeee