Error in installation step 3; could not connect to db

[qreations]

Hello,

i have installed v1.4.3.0 on an a test server (wamp + mysql). I've done all the steps as in the video (thanks for the video, it's really good).

But now i get an error in installation routine, step 3:

One or more errors have occurred, you can find more informations below or in the log/installation.log file.
Database server was not found. Please verify the login, password, and database server name fields.

The logfile is not really helping me:
*ERROR* 2011/07/17 - 20:42:14: Invalid database configuration.

I use wamp-server with php/mysql (v5.5.8) enabled.

This is my settings.inc.php file:
<?php

define('__PS_BASE_URI__', '/prestashop_1_4_3_0'); <--- this is the directory under wamp/www
define('_THEME_NAME_', 'prestashop');
define('_DB_NAME_', 'datab01');
define('_DB_SERVER_', 'localhost');
define('_DB_USER_', 'root');
define('_DB_PREFIX_', 'ps_');
define('_DB_PASSWD_', '');
define('_DB_TYPE_', 'MySQL');
define('_COOKIE_KEY_', '*******'); <--- i've replaced here by *
define('_COOKIE_IV_', '*******'); <--- i've replace here by *
define('_PS_VERSION_', '1.3.1.1');

?>


Where is my error?