This is my first post and I have to say i'm stuck with what to do next other than have to get a mac laptop, so here goes. My set up is a Mamiya RB with an old leaf valeo 11 back (i'm an assistant and I managed to get one second hand) I have checked all the different bits of kit and they all work just not together . The extension cables and back works happily on my office imac but I need to shoot into my laptop instead. Its a windows laptop with enough ram and tje software seems happily installed, its an xp service pack 3 windows laptop, I have an external firewire card which has an external power source and this powers up the back, (but the led only seem to stay yellow on the pc and not turn green!) and when I try to connect it to the leaf capture software I get the same error message asking if i have connected the back to the firewire cable (which it already is) I have tried all combinations of launching software and plugging things in, i just hope one of you might have an idea of a driver or something that will help make the system work!