Problem after trying to jailbreak with Redsnow

I have a Ipod Touch 4th Gen with 4.2.1 version firmware and I tried to jailbreak it with Redsnow and when the "waiting for reboot" came on it never left and did not look like it was going to leave. I already had nothing on it so i reset it from the ipod and It says connect to itunes with the usb picture... When i connect it and open itunes, its not there in itunes. Note: When i plug it in to the computer via usb, the sound does not.. sound ya know.