I am new to Blackrain, previously i was using pwnage tool. Anyway, 3gs iphone 3.1.2 jailbreak with blackrain rc3 has no issue. Then, installed Cydia and Rockapp has no issue. Go Cydia and install winterboard, it ask for restart the device upon completion. When it start, it stuck at the logo for long time. It tried to reboot the device again and it still got stuck! I tried enter DFU mode but the PC can't recognize the device. There is usb iphone device there! Any clue how to resolve it?