Really pleased you got it working.
I'd love to discover why changing the Ram configuration allowed a load of things to start working, when it seems like some assigns weren't being applied, we may never know.
If you have a way of getting new files onto your Amiga from the Internet, download Snoopdos and run it when you find something doesn't work. It's a really great app to show you what is failing like a missing file, or a path (or you might find it's already installed somewhere).