Running cron in multisite environment

I'm trying to automatic cron calls i cPanel in a multisite-Drupal environment. But it seems like the cron tries to use the default database even though I specified the path to the cron like this: domain.com/symlink/cron.php

The symlink points to the root Drupal folder. But when loading the http://domain.com/symlink/ the settings.php located in the sites/domain.com.symlink-folder is calling the correct database.

In cpanel I added the following path to the cron:
php /home/username/public_html/symlink/cron.php

The cron output is as follows:

X-Powered-By: PHP/5.2.6
Content-type: text/html

Warning: include_once(./sites/default/settings.php) [function.include-once]: failed to open stream: No such file or directory in cmsfiles/includes/bootstrap.inc on line 243

Warning: include_once() [function.include]: Failed opening './sites/default/settings.php' for inclusion (include_path='.:/usr/lib/php:/usr/local/lib/php') in includes/bootstrap.inc on line 243

Warning: Cannot modify header information - headers already sent by (output started at includes/bootstrap.inc:243) in includes/common.inc on line 141

Unsupported database type

@import "/misc/maintenance.css";@import "/modules/system/defaults.css";@import "/modules/system/system.css";
Unsupported database type

The database type is unsupported. Please use either mysql for MySQL 3.x & 4.0.x databases, mysqli for MySQL 4.1.x+ databases, or pgsql for PostgreSQL databases. The database information is in your settings.php file.

For more help, see the Installation and upgrading handbook. If you are unsure what these terms mean you should probably contact your hosting provider.