My Ipod nano is not recognized on itunes but my mom's ipod mini works perfectly?

When I plug my ipod in it says its charging but when my i plug in my moms it'll start to sync

Freckles...2009-03-23T19:07:59Z

Favorite Answer

reset it
unplug ipod from computer
then press menu and the center buttons at the same time until the apple appears
then plug back in and sync