Database / Header / Error / Help Please!

In My case, the problem was caused by trailing space in the WP-config file. Make sure that it looks like:

————-file wp-admin.php: first line just <?php

<?php
// ** MySQL settings ** //
define(‘DB_NAME’, ‘mydb’); // The name of the database
define(‘DB_USER’, ‘dbuser’); // Your MySQL username
define(‘DB_PASSWORD’, ‘dbpwd’); // …and password
define(‘DB_HOST’, ‘myhost’); // 99% chance you won’t need to change this value

// You can have multiple installations in one database if you give each a unique prefix
$table_prefix = ‘wp_’; // Only numbers, letters, and underscores please!

// Change this to localize WordPress. A corresponding MO file for the
// chosen language must be installed to wp-includes/languages.
// For example, install de.mo to wp-includes/languages and set WPLANG to ‘de’
// to enable German language support.
define (‘WPLANG’, ‘nl_NL’);

/* That’s all, stop editing! Happy blogging. */

define(‘ABSPATH’, dirname(__FILE__).’/’);
require_once(ABSPATH.’wp-settings.php’);
?>

——————so not even a white space as trailing char.

I’m really sorry, I am just a novice user with no knowledge of PHP at all.
Just downloaded wordpress 2.0.3, and it worked after the white space correction.
Maybe it could help to choose an other template?
I was quite happy with the greentrack template, modified it a little bit (translated it in dutch).
You can get an impression of what is possible with WordPress for a complete novice user at http://plutone.labarca.nl

grtz,
Plutone