Emergency call – Installation failed!

Hi there,

I think I did everything as suggested but it doesen′t work.
WordPress is on my server but it doesn′t install.
Here′s the error message:

Warning: require_once(/home/lifetin0/public_html/wordpress/wp-includes/wp-db.php) [function.require-once]: failed to open stream: No such file or directory in /home/lifetin0/public_html/wordpress/wp-settings.php on line 100

Fatal error: require_once() [function.require]: Failed opening required ‘/home/lifetin0/public_html/wordpress/wp-includes/wp-db.php’ (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home/lifetin0/public_html/wordpress/wp-settings.php on line 100

Please give me a clue, but easy going, I′m just beginning to understand.

thanks,
fanny