It's not clear from your message what problem you are having exactly.
Have you already downloaded firmware files for 3.2.1 and / or 3.2.2? You can still download 3.2.2 directly from the apple support website, so it is still available. Google can help you find 3.2.1.
If you have them downloaded, then what is the exact message you are getting. If it it is that you are not authorised for that version, then you are not using tinyumbrella properly. Have you started the TSS Server?
Provide more detail on the error you are getting and we'll see if we can help further...