I have a jailbroken ipod 4G (IOS 5). I tried to install something off of cydia but there was an error in the installation. Something about not having the right files. So then I put it in DFU mode and rebooted it with redsnow (tethered jailbrake) and it finishes everything but gets frozen at a black loading screen that only shows this circle thats loading. (The kind you get when a youtube video is loading). I can't even get it to reset it to its factory settings because itunes can't hook up to it. I even let the battery die and tried rebooting it then. Still nothing. Please help.