Redsn0w stuck on "waiting for reboot" iPhone 3GS 4.0.1
I recently jailbroke and unlocked a iPhone 3G 4.0.1 with redsn0w and ultrasn0w and had no problems. I tried to do the same with a friend's iPhone 3GS 4.0.1, but it always gets stuck on the waiting for reboot after the second upload.
I'm using redsn0w 0.9.5 beta 5, and I have tried running it on a PC with xp, unplugging and then replugging the USB cable, and I don't know what to try. Does redsn0w even jailbreak 3GS?
Thanks in advance to anyone who can help