iPod touch Ipod won't restore / stuck loading

[Wolvez]

I recently updated my ipod touch 3g and tryed to back it up but it couldn't so I went on to the updating process but the loading bar would always get stuck like this:http://s1126.photobucket.com/albums/l605/Timmy_Joe/?action=view&current=ipodglitch.jpg
Does anyone know how to fix this
EXTRA INFO:
Name: Ipod
Capacity: N/a
Software version: N/a
Serial number: N/a