Although I am not sure what you are trying to do, I would have a look at the camera… When I went to download the last video I shot I found that both my PD170 and my PD100 were nolonger recognized by FCP…. as impossible as this seems, it turns out that both the firewire connections/ports on BOTH cameras were blown…. the problem had nothing to do with the MAC or with FCP…. I had to have the motherboard replaced on the PD170, at great expense! It turns out that the connection is a tad more delicate than we have all been led to believe, and you have to make sure the camera is off before you unplug… All works a treat now!
Good luck…