Don’t know if anybody still wants to know more about the 01X and Windows 7:
I have my Yamaha 01X working great with Cubase 6.5.3 and Win7 32bit. It’s not easy to get it working but it’s possible.
For me info take at look at this mLAN forum:
http://mlan.dailyforum.net/viewforum.php?f=7&sid=dc3c175de1b1cfefc9fec1eb71023aa7