As the title says, every time I get to the process of unlocking my iPhone and it prompts me to go into DFU mode, it just won't do it. I'm using redsn0w 0.9.4 along with the 3.1.2 restore. I upload the proper files and do everything it says but when I'm supposed to go to DFU, nada. My iPhone is on 3.1.3 and I'm doing this on a Windows 7 machine. iTunes isn't installed.