I have always had troublr with my GL-2 firewire connection. I finally realized that one of my external drives was part of the issue. If I unplugged my drive (firewire) and then plugged in the GL-2, everything was fine. Must have been an ID thing. Never really figured out the specifics though.
Do you have any other firewire devices hooked up (maybe internal even, though not likely on a LT).