I presume that your hookup is not adressing midi only?

Check with headphones first if there's any sound from the PC (laptop?) itself.

If you want the audio connected you might have to install the appropriate audio drivers for your Fp7 on the PC first, then address the FP7 as primary audio interface in BIAB.
Or even in windows on the PC, and check sample frequency also. BIAB usually works best with 44.1 kHz.