i have the same problem. just purchased a new 64bit laptop only to find out that VV only works with 32bit. I've contacted numark reps about 4-5months ago and they said they dont have any drivers available for 64bit yet.....booooooo!!!!!! but im still managing on an older laptop (32bit of course). COME ON NUMARK, lets keep up!!!
oh btw....ive been researching on alternatives. try using Audio 4 0r 8 sound card from Native Instruments($300-500). it can be used for 64bits. Just hook up the same way as you would with the VV soundcard. hope that helps.