PVR-150 and Vista 64 bits (1 Viewer)

[Simius]

I recently installed Windows Vista Business 64 bits on my new machine, but could not get my Hauppauge working. The card seems to be correctly installed (I tried with drivers "in-box" from Vista 64 and drivers from Hauppauge CD 4.1), I can see it in Configuration, but when I enter MyTV, the TV doesn't start. If I try to scan channels in MediaPortal Configuration or in WinTV, the machine freezes.

Does anybody have the same problem?

Could someone give me instructions on what driver to use and how to install it correctly?

Here is my configuration:

DualCore Intel Pentium E2140, 1600 MHz
2 GB RAM Kingston DDR2 667MHz
ECS NF650iSLIT-A
NVIDIA GeForce 8600 GT
Hauppauge WinTV PVR-150

MediaPortal 0.2.3.0
MyTV - Engine 0.2

Thanks a lot for any help!!!