You will possibly also need a Vista driver for the parallel port card.
While I haven't installed a Parallel port card in Vista, I have in XP and
needed a driver from the card's manufacturer.
Go to the card manufacturer's web site and see if one is available. (If you
don't find one for Vista, see if one is available for XP. That will
indicate whether a driver may be needed and if there isn't one for Vista,
the card may not be supported.)