Cambridge Audio DacMagic100

I’m using a RaspberryPi3B with volumio, this works great via the headphone Jack but won’t produce any sound when plugged via a USB to my CambridgeAudio DAcMagic100. I noticed other people here advise to make sure the cambridgeaudio is in USB2 mode, I have checked this and it is. It’s my first volumio install so I’m not 100% what the settings should be on this. Can anyone assist?

Just to follow up, I managed to get things going in the end. I went to go re-flash everything and noticed I couldn’t connect to the dac using the cable that cambridge audio supplied, so once replaced with a manky old printer usb cable it roared into life.