I use a PCMCIA card to capture video from my Sony HC3 with no problems. I tried to export an edited film to tape and although the camera started recording at the appropriate time no signal was sent to the camera. It just recorded a blue screen. When I do the same procedure using the 4pin firewire socket built into the laptop it works fine. The problem is these sockets are a bit delicate and I have had them break in the past which is why I got the PCMCIA card which has the more robust 6 pin sockets.