I cannot get my Sony HDV 1080i/miniDV to upload video footage onto my computer!

I have tried with both my mac and my pc. With my mac, the camera icon pops up and only contains still photographs.
When I tried with my pc nothing showed up at all.

I am using a USB firewire cable that fits perfectly; I just don't understand how to access the footage on my computer!

Please help!--I have to make some short films for my college application by January.