My iPod 2G is already jailbroken (tethered) and perfomed reboot several times now. After installing an app, my ipod restarted and I did the reboot process of putting it in DFU mode. Everything is fine until the apple logo appears and nothing happens. The ipod will return to the state as if it was turned off or restarted. Everytime I try to iTunes restore or re-jailbreak, I got a "The ipod could not be restored. An unknown error occured. (1601)" message appears. I already tried every possible solution I can think of but to no avail, any suggestion? TIA!