Your card isn't being recognized by REW for some reason.
You should be able to control the card with Windows though.
Select DEFAULT for both Input and Output and use the Windows mixers to control the setup levels and see how that goes.
Below are the Windows Playback and Record settings from my system.
It shows the two mixers and their interaction with REW. See how that goes...
PLAYBACK MIXER
Windows MIXER Playback.jpg
RECORD MIXER
Windows MIXER Record.jpg
REW MIXER
Windows MIXER plus REW Mixer control interaction.jpg
brucek