Hi Uday,
the dll belongs under lib/jars/custom as shown your screenshot.
the jar file belongs under packages/WmJDCAdapter/code/jars/static in this case and not under packages/WmJDCAdapter/code/jars/ as usual.
Due to the native part (the auth dll) it is required to shutdown and restart the IS, otherwise the dll will not be loaded and recognized correctly.
Regards,
Holger