Hi Mike,
the version you mention is listed under Win2000 drivers on M-Audio Website. Are you sure it can work on Win7 64Bit?
I can imagine using these drivers on XP but not on Vista or Win7, because Microsoft changed the Audio Drivers completely.
I own 2 of these cards as well, but didn't put them to my production computer yet, because of known problems.
So I'm interested how others solve the problems, even if I can't try the solution at the moment.
Kind Regards
Malte