Volumio 1.55, Pi2 and North Star DAC32

Hi all,

Just got my Raspberry Pi 2 yesterday and installed Volumio 1.55 immediately. I plugged (USB input) and turned-on my North Star DAC 32 then switched-on Raspberry Pi2, but it seems that Volumio could not recognize the DAC (MPD Configuarion/Audio Output: ALSA only). I tried to reboot Volumio, same situation happened.

Does anyone know how to fix this, or maybe North Star products are just not supported by Volumio (i tried to use RuneAudio and it works with Pi2 and North Star DAC 32, but i really prefer to use Volumio if possible)? Thanks.