K8055 64 bit? problem

K8055 USB interface card

I have someone writing a visual basic programme, which uses the K8055 card to implement some USB output functions.
The system works very well with Windows XP (32 bit) and also with Vista (32 bit). So far, however we have had no success at all with either Vista or Windows 7 - 64 bit systems.

Is there a problem with 64 bit operating systems?

Thanks

Please see the three last posts of this thread: viewtopic.php?f=3&t=4005
There is the solution to this Visual Basic problem in Windows 7 64-bit.