error in data base

hi
i see this error in my site
please help me
Warning: mysql_get_server_info(): supplied argument is not a valid MySQL-Link resource in /home/admin/domains/bloghaa.com/public_html/wp-content/db.php on line 659

Warning: Cannot modify header information - headers already sent by (output started at /home/admin/domains/bloghaa.com/public_html/wp-content/db.php:659) in /home/admin/domains/bloghaa.com/public_html/wp-includes/functions.php on line 3191