Changing wordpress directory

Basically my wordpress directory used to be /wordpress but I moved it to my root so now It would be my main/index page but when I try to edit the wordpress/blog link in admin panel (Settings) I get this error.

Warning: is_writable() [function.is-writable]: open_basedir restriction in effect. File(/) is not within the allowed path(s): (/home/test:/usr/lib/php:/usr/local/lib/php:/tmp) in /home/test/public_html/wordpress/wp-admin/includes/misc.php on line 128

Warning: Cannot modify header information – headers already sent by (output started at /home/test/public_html/wordpress/wp-admin/includes/m