Zulan: this error says you have the path to the file wrong in your bb-config.php.
Warning: require_once(../wp-blog-header.php)
[function.require-once]: failed to open stream:
No such file or directory in
/var/www/www.zulan.se/bbpress/bb-config.php
on line 41
What path do you have listed to wp-blog-header.php on line 41 in your bb-config.php?
