I have the same model and bought it for the very same reason. You MUST have firewire even if you load via USB. Unfortunately it does not tell you that, but without it all you will get is your stills. The cards are not expensive. I bought one at Circuit City, but do not remember the price, just remember that it was not expensive. I bought the one that has 2 USB connectors, but you can also get the one that has both options available.
Very frustrating, but that is why you cannot view your movies. Hope this helped.
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