VIX Com on 64 bits

It looks to me that Vix Com doesn't work on 64 bits or I'm doing something wrong. What's happening is that the call:

VixLibClass myVixLib = new VixLibClass();

job = myVixLib.Connect(1, Constants.VIX_SERVICEPROVIDER_DEFAULT, null, 0, null, null, 0, null, null);

fails with:

Unhandled Exception: System.Runtime.InteropServices.COMException (0x80040154): Retrieving the COM class factory for comp

onent with CLSID {6874E949-7186-4308-A1B9-D55A91F60728} failed due to the following error: 80040154.

Same code works on 32 bit platform.

Anybody any idea? Anybody made it work on 64bits?

Thanks!