After a firmware update itunes can't see the ipod

Plug your iPod to your computer and open iTunes, if iTunes doesn't open automatically.

If there is a new version of the firmware for your iPod, then iTunes gives you a pop-up message saying so.

Click "Update" if there is a newer version of the iPod firmware available to download.

If there is no new firmware, or you want to downgrade the firmware, then skip this step.

Download the iPod firmware you want to reprogram you iPod with from the Internet.

Websites such as Modifymyi, iClarified and Felixbruns (see Resources at bottom).

Right-click on the "Restore" button in iTunes and select the firmware for the iPod that you downloaded.

ITunes then backs up the music in your iPod, reprograms the iPod with the new firmware and then restores your iPod.

http://modmyi.com/wiki/index.php/IPhone_Firmware_Download_Links

http://www.iclarified.com/entry/index.php?enid=757

http://www.felixbruns.de/iPod/firmware/

hope this helps

1. First turn it off
2. Then press the HOME button
   
3. while pressing the HOME button, plug it in to the computer
4. Let go when you see the connect to itunes logo
5. Then go to itunes, and click shift (apple click on mac) and keep holding it and at the same time click update or restore (depends if you want to update it or restore it)
6. a window will pop up, find your firmware ( you can download it here: http://www.felixbruns.de/iPod/firmware/)
7. then wait for it to extract and update or restore