Arturia Keystep 32 not recognised as input?

Hello, a total newbie question. I am sorry. I have connected the Keystep 32 to my PC and have set the dip switches to "internal" but the keystep is not recognised as an input device in Ableton. I can only see it as an output device? I am trying to play using a soft synth like vital and record that in Ableton. What am I doing wrong?