Hey everyone, I was trying to jailbreak my iPod touch 4g running 4.2.1 firmware, but when I put it in dfu mode, my computer doesn't recognize it. I have successfully jailbroken it once, but I decided it was worthless without cydia working, so I restored it to factory default through iTunes. Now that greenpois0n is out, I tried to use it to jailbreak it again. Since it didn't work in greenpois0n I tried it in redsnow with the same result. Nothing will recognize it when it is in dfu mode. I can easily get it out of dfu mode and when it is turned on, my computer does recognize it. If you know what my problem is, please help. Thanks!!!