Downgrading ipod 4.3 to 4.2.1?

i got an ipod a few days ago, 4th gen 32 gb, and i upgraded it to 4.3 without thinking, now i want to jail break it so i downloaded the firmware for 4.2.1 and put it in DFU mode, and when i shift clicked restore and selected the firmware, it came up with an error like this "The ipod "ipod" could not be restored. an unknown error occurred (3194)" and same error comes up when i try it with the firmware for 4.1. also the error comes up when it gets to the point where is says "verifying restore with apple" please help!