with the pokeys 10.6.4 plugin is only for the Old style original PK USB (the 55T).
the CNC keyboard is on an I2C bus, and that can only be set on the New PKU or PKE, Brian is the one doing the new PK plugin, so you will need to download it
(it is in Beta by the way), and as far as I am currently aware is still being worked on due to some changes in the way the PK DLL worked. So, Brian is having to redo some stuff in it again.............
I recommend, you post on the Yahoo Group, and ask Brian there directly what the status of the new plugin is.
Scott