Native Instruments dropped the support for anything bellow Windows 7 (incl. drivers), so their current beta driver installer (126.96.36.1991) does not work on Windows Vista x64.
The current stable version (188.8.131.526) still works with the current firmware (45), but what if one time it does not. So my problem was how could I use this current beta driver with my Vista x64.
After exchanging few mails with Natives support it was clear that I will not get any support from them.