The DVC170? Pinnacle hasn't supplied any Vista64 drivers for that device, have they?
If it's the DVC107, you'd be in luck (link), but the DVC170 isn't supported at all in Vista64, as far as I can tell.
Is it?
What's *really* galling is that the Dazzle Video Creator Platinum package was mentioned in the "Pinnacle Vista Pledge", and was supposedly supported in Windows Vista back in March '07, IIRC. However, that was Vista 32 bit...and Pinnacle has evidently decided that "Being compatible with Windows Vista in 2007" (as the old Vista pledge stated) didn't extend to Vista64.
BittMann