Hi,
This may be related. I have been installing Korg padKontrol on a 64bit PC using Cubase 6.5.
I have not sufficient midi connections so I have connected to the padKontrol via a USB connection.
After I had loaded the Korg files from the CD I connected the USB to the device(padKontrol) It then recognised and downloaded the drivers. I then got the later Drivers from the Korg website to make sure. These are:
Korg USB Midi Driver for Windows - UserMode Driver = Ver 1.13.00.03
Korg USB Midi Driver for Windows -Kernel Mode Driver = Ver 1.06.00.01
PadKontrol Editor Librarian Ver 1.01
When I set the connections for 64 bit only I could not get midi to trnsmit both ways.
This was solved by changing the setting to 32 Bit. The drop menues then displayed the full USB options.
Hope that helps:)