How to get audio via USB cable?

I was using Window 7 Pro 64 bit when I was trying to get Cubase AI 7 to work. I could click on devices and get to a menu showing a tab for audio input, and the two device (left and right channel) select boxes were set to the MOXF8. Then I clicked on the tab for audio output, and in the two device selection boxes (left and right channel), the only choices were “not connected” or MOXF8.

The sound card did show up as an option for some of the MIDI inputs or outputs, but the audio selections were restricted to the MOXF8 or “not connected”.

I couldn’t find any documentation or manuals for Cubase AI 7 that indicate what devices are supported for audio input or output.