Hi superfly74 and welcome to our happy home that is the forums
I have seen a few post recently from people that are unable to capture from their camcorder and I have always advised the followin:
Boot PC
Connect camcorder via firewire
Power on the camcorder
Start the editing programme.
In most cases when the above order is followed the PC and the software will detect the camcorder and capture is successful. The software only tries to detect the cam on startup so if its not there at that point then it will never see it.
HTH,
Mark.