You have to connect it to a computer that has been Authorized in iTunes for that device. What that means is, the computer you've used to sync your iPod to. Once you do that it should give you the option to unlock it and reset your password.
Contact apple, go in to a store and speak with the techs or call 1(800) apl-care have your serial number ready when you call! It's on the back of your iPod... On your sim card tray for your iPhone. If you can't figure that out go to the store.