Vegas does not work with the Raptor (which uses a prioprietary canopus driver). Vegas DOES work with OHCI-compliant IEEE 1394DV cards, like Pyro or SIIG.
Even if you could get it to work, Vegas is purely software-based, and wouldn't take advantage of the Canopus card's extra features. If you want to use Vegas, try picking up an OHCI-compliant firewire card. Any generic one will do, and they can be found on the cheap between $20-$30.