The only thing I never tried was using ASIO4All as the driver for the Steinberg interface. I'll try that sometime.
...
Jim
Gee, I hope it doesn't come to that. The irony here is thick: Steinberg invents ASIO, Steinberg makes a sound card, and you try to make it work by using a driver that isn't ASIO but a wrapper that simulates it.
I have lost track without re-reading the thread, but what happens when you use the MME driver?