I'm having some trouble capturing HDV footage in Sony Vegas 8.

Camera in question is a Z7 linked to my PC by iLink. In the external video capture application it doesn't seem to recognise that the source is HD and so won't preview any video and won't capture any clips (just creates 0kb clips that disappear once you stop recording). In the internal video capture program which Sony Vegas help says to use for HDV the camera device can't be found.

Any help would be greatly appreciated