HI BEN,
YOu have the same problem that I have. I have been sidetracked for a couple of weeks and have not worked on this problem anymore. I hope to get back to it this week coming and hope for a resolution. I have tried all the drivers from 2.1.13 that came on the floppy through 2.1.16 from Yamaha.
The 13 driver loaded first time into my laptop so it has to be a conflict in my desktop.
I will let you know what I did to resolve the problem if I get it done before you do and would ask you to do the same.
Best regards,
Bebop