i/o card not fitted

Pair of new SQ Dante cards. Either one in my SQ6, the lights on the card come on, but on the board Setup-I/O Port shows nothing and says i/o card Not Fitted. Dante Controller only sees my laptop.

I assume you have the latest firmware in your SQ? It looks like the latest firmware adds support for V3 of the Dante cards.

Of course that was it.