Reply to traktor 2.5, kontrol s2, microphone line through, recording mic

Hey ladies and gentlemen, I want to use my mic to record freestyles and audio drops and record performances in traktor 2.5 using a kontrol s2. There are a couple vids out there that say to use your "c" or "d" deck as a line through and to enable the mic in preferences "internal routing" though when I try to enable it the only option in the dialog box is "not connected"... any help with this would be awesome!!

Thanks,
Jake Styles