[SLE] Help : Firewire drive no longer detected.

I own a 250GB LaCie firewire and USB drive. It was working well with SuSE 9.2 but slowly with Windows XP SP2. I upgraded the firmware as recommended by LaCie in order to solve the Windows XP+SP2 problem, and it is solved. BUT my drive is no longer detected by Linux. What can I do ? it is impossible to come back to the old firmware ! Thanks. Michel.