I could not get PE to recognize my Canon HV20 camcorder. via Firewire. The error message was "Capture device not found".
All hardware,software, and drivers checked out fine.
I discovered that the default setting for the "AV to DV" is set to OFF every time the camcorder. is turned on. So, now when I turn on the camcorder. to the PLAY function, I first reset "AV to DV" to ON in the camcorder. setup menu before plugging it into the firewire port. That solved my problem.