The Avermedia A180 card does not work with MediaPortal under vista64. I have even tried the generic Phillips driver as well as several other drivers for this chip, and none of them work at all. I have also tried several software MPEG drivers with each of the manufacturer drivers with no luck. The card works fine without any config needed in every other media center application I have tried. I cannot find a CaptureCardDefinitions.xml file anywhere on my hard drive (yet my other ATSC tuner works?) It is just my secondary card (thankfully), but I would like to be able to use it...that is why I checked the MediaPortal compatability list before buying it.