Hi, I bought a new Macbook Pro 2.4GHz couple of weeks ago. Before this I had a RevA MBP (CoreDuo) with a Siig Firewire 800 ExpressCard34. I didn't have this problem on that setup. Now using the built-in FW800 port on the MBP, when the drives are connected, the computer won't boot. It just hangs on the grey screen with Apple logo. When I try and boot with the drives connected it boots fine. When the computer has booted I can plug the drives in and they work fine. Is there a work around for this?