No sound output from USB PWD MKII


I have just pick up a PWD MK2 dac but there is no sound output from the usb source from my sotm sms200 streamer but spdif works just fine.

I have done some troubleshooting to see if my streamer is faulty but it works fine with my other t+a dac 8.

Does anyone have a solution for me?

Thank you.