So i tried to put a diffrent passcode for my ipod

1. Plug the iPod into the primary computer linked to that iPod, the first computer you synchronized it with unless you have designated another computer as the primary computer.
2. Open iTunes and sync the iPod as normal.
3. Remove the iPod, following the normal removal procedure. The iPod unlocks automatically as you remove it.
this should unlock it if that don't work the try the restore option from itunes it will reset it to factory settings