need help getting music back on iphone

[Acronym]

while fixing some iphone stuff on my sisters computer cause mine has a virus and cant be used her dumb itunes ereased my music except for stuff purchased on my iphone i had backed up my music on her computer via a program that does that stuff, and now it wont go back on and itunes wont recognize my iphone anymore.



any ideas? its a Vista laptop (acer)