JDBC adapter not accessible

I have webmethods 6.1 installed in my PC. But in administrative panel, only showing wmDB in adapters list and JDBC adapter is not showing. I have checked that JDBCAdapter is already installed in my PC.
How do i configure the JDBC adapter now. I have already copied classes12.jar to C:\webMethods6\IntegrationServer\lib\jars.
This package is also there

Thanks in advance

check if the package is loaded completely without any erroror partially on IS admin page under package management.

One more thing, make sure that you have restarted you IS instance after putting classes12.jar under IS/lib/jar and common\db\lib directory.