I'm wondering if the firewire card is bad. Can you also check to see if that card uses the "Oxford 911" chipset? I've heard that that particular chipset is more reliable for Macs than any other chipset. Lastly, check your cables, power supply and external firewire hard drive are in good shape. Even something as simple as that can be overlooked.

73s de Phreakout. :rambo: