Topic: FIREFACE 800 not recognize on Mojave

There's no way to recognize my FF 800 on Minimac 2019 Mojave. I've always the red led on FF800. Any suggestions?
The strange thing is that my Mac recognized the ff800 only once a few days ago. At a second start it never worked again.
I tried to reinstall the drivers but without success. Do I have to think that the firewire card has burned out? It looks very strange. Please help me because I have an external registration that I can only make with FF800

My root:

FF 800 - firewire-tb2 - tb2-tb3 / driver 3.39 - Macmini2019 10.14.6