db.php on line 839

after configure the db-config. i check my screen and this come up:

Warning: Invalid argument supplied for foreach() in /home/noel7000/public_html/sitesini.com/wp-content/db.php on line 839

Warning: mysql_error(): supplied argument is not a valid MySQL-Link resource in /home/noel7000/public_html/sitesini.com/wp-content/db.php on line 437

Warning: Cannot modify header information – headers already sent by (output started at /home/noel7000/public_html/sitesini.com/wp-content/db.php:839) in /home/noel7000/public_html/sitesini.com/wpmu-settings.php on line 154

What should i do?