Ok, I'm guessing you already updated the FW? Yes, pleaes remove the file if you already updated but it sounds like a Nopass problem as you are just getting those white screens. Make sure the Superkey is in tight and hen try just booting the DS with out it. If it lets you into the menu and has shows the SuperCard in teh GBA slot the SC should be working fine. We need more info on your setup and what you have done so far and then we can help you.