Multi DB Errors

Keep getting errors from the plugin, installed and working, but lots of errors:

2013-02-28 04:32:04.463 [NOTICE] [123.125.71.58:35088-0#APVH_www.mcatoolkit.com] [STDERR] PHP Warning: mysql_set_charset() expects parameter 2 to be resource, boolean given in /home/mcatoolk/domains/mcatoolkit.com/public_html/wp-includes/wp-db.php on line 650
2013-02-28 04:32:04.463 [NOTICE] [123.125.71.57:16551-0#APVH_www.mcatoolkit.com] [STDERR] PHP Warning: mysql_set_charset() expects parameter 2 to be resource, boolean given in /home/mcatoolk/domains/mcatoolkit.com/public_html/wp-includes/wp-db.php on line 650
2013-02-28 04:32:04.526 [NOTICE] [123.125.71.78:61654-0#APVH_www.mcatoolkit.com] [STDERR] PHP Warning: mysql_set_charset() expects parameter 2 to be resource, boolean given in /home/mcatoolk/domains/mcatoolkit.com/public_html/wp-includes/wp-db.php on line 650
2013-02-28 04:32:04.535 [NOTICE] [123.125.71.80:61941-0#APVH_www.mcatoolkit.com] [STDERR] PHP Warning: mysql_set_charset() expects parameter 2 to be resource, boolean given in /home/mcatoolk/domains/mcatoolkit.com/public_html/wp-includes/wp-db.php on line 650
2013-02-28 04:32:05.476 [NOTICE] [123.125.71.80:61941-0#APVH_www.mcatoolkit.com] [STDERR] PHP Warning: mysql_error() expects parameter 1 to be resource, boolean given in /home/mcatoolk/domains/mcatoolkit.com/public_html/wp-includes/wp-db.php on line 1023

These are just a few, quite a few others.