I successfully hacked my ipod touch 2nd Gen, 3.1.2 firmware with blackra1n. Since then, I have occasionally turned it off and then booted it again with blackra1n. But today, it was turned off and now it won't boot. I get stuck at a black screen and Geohot's picture never shows up. I am on windows xp and using blackra1n rc3. I have tried everything that I could find. Please help.