Please can someone tell me what I'm doing wrong.

I've installed a 4 port firewire controller PCI adapter in my computer, it appears in device manager and seems to have installed OK as it doesn't have the yellow exclamation mark triangle next to it.
On the box which the firewire came in it says 'no drivers required', so that's ok.

I attached my camcorder to my pc via the cable which came with the firewire card but my computer doesn't recognise my camcorder when I switch it on .... I'm totally baffled by this.
When I connect and switch on my camcorder to my pc I get this message:
"One of the USB devices attached to this computer has malfunctioned and Windows does not recognise it".

Incidentally my camcorder records onto a mini cassette tape.

Please can anyone help me?