Clean Install And Iphone Music Library

[808]

i did a clean install on my MBP and now when i plug in my iphone 3gs
it loads but all the songs cannot be played. how do i fix?:o:o

[PhightinPhils26]

i did a clean install on my MBP and now when i plug in my iphone 3gs
it loads but all the songs cannot be played. how do i fix?:o:o

Make sure you are logged in with your Apple ID, it needs to be authorized.

[808]

that's weird,
i thought that would do it, but it's saying that this computer
is already authorized but it's still not letting me play music off the iphone!
:confused::confused::confused::confused: