[TYPO3-english] Fatal Error Typo3 6.1.

[Mario]

Hi Team

Since I accidently uninstalled a database connector from the extension manager I alweys get the following message in the BE

Fatal error: Call to a member function query() on a non-object in /var/www/web1210/html/typo3/sysext/core/Classes/Database/DatabaseConnection.php on line 981

I am not able to find any corresponding extension in the typo3conf/ext folders. Do you have any ideas?

Thanks!