Hi, it seems that something's wrong i have a fatal error

Hi,

I have this error after installed and configured the plugin, any tip?

Plugin could not be activated because it triggered a fatal error.

Warning: require_once(/home/mitribu/public_html/wp-content/db-config.php) [function.require-once]: failed to open stream: No such file or directory in /home/mitribu/public_html/wp-content/plugins/multi-db/db.php on line 105

Fatal error: require_once() [function.require]: Failed opening required '/home/mitribu/public_html/wp-content/db-config.php' (include_path='.usr/lib/phpusr/local/lib/php' in /home/mitribu/public_html/wp-content/plugins/multi-db/db.php on line 105