Cubase 5 input buses no signal

Running Cubase 5.5 on Windows 10, using a Mackie Onyx 1620i 16-channel board.

Everything works fine, from a board and output perspective. I have signal from Cubase through the firewire connection into the board and then out to external speakers.

In the windows recording devices areas, I see all the Mackie channels and can get signal on them with, say, a mic (albeit pretty low). MY buffer size is set to 256.

Cubase recognize the ASIO driver and displays all the appropriate channels.

After adding all the appropriate buses in cubase, and assigning those to a channel, I get no signal.

Anyone have this type of setup that can help?