There has never been a working Firewire to USB adapter cable. Since you omitted what that part was I'm going to write that's a ripoff and you need to stop using it before you damage the USB ports.
Bob
I recently got a new HP Envy 8 desktop. I am wanting to upload all my miniDv videos onto my hard drive from my old camcorder. I bought a firewire adapter to be able to send the video into my desktop since there is no firewire input. The firewire plugs into the adapter and the adapter goes into a USB port. When I go to plug it in the computer shuts down. I can use the same USB port for other things (memory sticks, chargers) but this adapter shuts the computer down. ANy ideas?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic