Ahhh, you are using ClassicWB.... that might explain it. I stopped using ClassicWB a few years back as I had no end of issues with things working. Is that version of ClassicWB using Scalos?Right showered, woke up and got a coffeeand in the messy mancave.
CDTV loaded and here are some pictures showing the system and screenshots
As you can see no other options I've had a similar issue when installing RTG cards, if I remember correctly that required an addition line in the Startup-Sequence wonder if it's the same added a pic to show it just has LoadMonDrvs in SS