Myriad RF1 with Zipper board Windows 7 64bit Driver

I have the Myriad RF1 and the Zipper board connected.
Trying to have it talk to a Windows 7 64bit using the USB.
The problem is that windows recognized the zipper board with VID_03EB and PID_204B but does not want to install the driver using the instruction from Cypress. I have modified the inf file to include the VID and PID of my board.
What can be the problem?
Any help is greatly appreciated!