I have a Powerbook G4 1.5. I just bought a Western Digital 1TB External HD triple interface. I am using the FW 800 connection. It seems that when I have this hooked up and have been accessing data, I can't use my FW 400 port. I plugged in my video vamera to load video into IMovie, and it would not recognize the video camera. When i unplugged the drive, then the camera came up. Then when i tried to plug the drive back in, it wouldn't recognize that. But once I unplugged the cable from the camera, the drive mounted. Any thoughts or things I should try?