Need quick database wordpress help
 

Hosting Co. changed the name of the DB server, went into the wp-config and changed it from 'localhost' to the new name and 3 out of my several blogs still arnt working and showing:


Fatal error: Call to undefined function: wp() in /home/xxxxxxx/public_html/xxxxxxxx/wp-blog-header.php on line 14


But that error doesn't make any sense on either that file of line 14. Ever seen this?