So I have been trying, unsucessfully, for about three days to jailbreak my iPod touch First Gen. I have used WinPwn QuickPwn, redsn0w, ZiPhone, Voltage, and all of them over again with downgraded firmware. My computer realizes that the iPod is in DFU mode but none of the programs I have tried to date have been able to recognize it. I am currently running 2.0.2 and would like to get back to my original 2.2.1 but iTunes is blocking me from doing so. Please help, I have tried different USB cables and even different ports on my computer.