My problem has been on going from the time wifi sync was an option on my ipod touch 4th generation. I set it up, disconnected the ipod and wifi sync worked fine. Then suddenly it sopped working, i would get the message that "wifi sync will resume when computer is available", which it was. what i did was restart itunes and then wifi sync worked again but then after minutes or sometimes hours it would stop again and i would have to do the same thing with itunes, restart. this is continuing over and over again. i do not understand the problem. i am running windows vista. i would appreciate any help