I wanted to connect an audio interface (6-pin) with my computer (4-pin) to the cable. There may just be compatibility problems between FireWire chipset and the interface with Firewire interfaces often, I had initially suspected the problem at this point. A connection could not be established namely. The notebook has been no connection noises when plugging and Firewire Connection LED on the interface is not lit up. I've spent many hours trying to test a variety of drivers for my firewire card, to torment me by phone hotlines of the provider and I even played with the idea to convert my two weeks old notebook. As a final solution, I then me a higher quality Firewire cable concerned and do not see, everything works perfectly. I still can not believe that here actually defective cables are delivered to the customer there. If just thinking about how much time and nerves me the cable has cost ... Let's be honest, so no one expects it!