Has anybody been successful capturing video on Windows Server 2003?

Both virtualDub and my capturing application (winfast PVR) fail to see any capturing device.

The WDM drivers seem to install fine.

I have a Winfast MyViVo from Leadtek. Works fine on XP.

Is this a WDM driver issue? not sure what else to try. I have tried several WDM drivers including the latest from leadtek with no luck.