Fatal error after new root dir

Hey,

I moved my wp folder into root direcotry as shown here https://www.youtube.com/watch?v=irD7-t8Lk_o
Homepage is ok, but when I want to open other pages this is what I see:

Warning: require(/home/somorg2/domains/som.org.pl/public_html/wordpress/wordpress/wp-blog-header.php) [function.require]: failed to open stream: No such file or directory in /home/somorg2/domains/som.org.pl/public_html/wordpress/index.php on line 17

Fatal error: require() [function.require]: Failed opening required ‘/home/somorg2/domains/som.org.pl/public_html/wordpress/wordpress/wp-blog-header.php’ (include_path=’.:/usr/local/php/p53/lib/php’) in /home/somorg2/domains/som.org.pl/public_html/wordpress/index.php on line 17

the line 17 is:
require( dirname( __FILE__ ) . ‘/wordpress/wp-blog-header.php’ );

what did I wrong?