how do i authorize my new computer to a ipod?

Sorry, but your question is contradictory. Are you trying to connect a new iPod to an existing computer? Or an existing iPod, one with content you wish to preserve, to a new computer?

Message was edited by: varjak paw

A computer, not an iPod is authorized for the account used.

iTunes Store: About authorization and deauthorization

An iPod and computers are associated with an account for iCloud

iTunes Store: Associating a device or computer to your Apple ID

Can you describe your problem?