According the Splunk, if your database not listed in Splunk DB Connect 3, is necessary configure the new database according the link
http://docs.splunk.com/Documentation/DBX/3.1.2/DeployDBX/Installdatabasedrivers
Was Configurated according this
Driver download and input and the drivers directory
Include in directory local, the file db_connection_types.conf with this configuration
After this, the splunk was restarted and no have any information of this database in my Splunk Db Connect
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