Focusrite Saffire Pro 40 FireWire Audio Interface 1U Firewire Issue

Focusrite Saffire Pro 40 FireWire Audio Interface 1U Rack

Cannot get FireWire connection to work.
Otherwise functions well as a standalone unit.

Professional Focusrite Saffire Pro 40 FireWire audio interface featuring 8 high-quality Focusrite preamps, ADAT I/O, S/PDIF, and MIDI connectivity. Housed in a durable standard 19-inch 1U metal rackmount chassis. The unit is in good cosmetic condition with light surface scratches and minor wear from studio rack use, and is missing one small plastic knob cap on the front right panel as pictured. An excellent, reliable multi-channel interface solution for home or project recording studios requiring versatile input and output routing.