I have tried searching for this in the forums, but cannot find a solution.
I have an old iPod with video 30gb, that has all my music on it, about 5800 songs. All the songs play on the iPod. They are all synced on my iTunes (latest version).
I just got the ipad2 (iOS5.01), and ran sync. I can see all my songs on the iPad, but most of them are greyed out. I cannot play those. There are a few that are not greyed out, which I can play. The iPad is set to sync all the music folders automatically.