Hello, I just updated to iOS beta 4, the latest beta version of iTunes, and OSX Lion. Everything was running smoothly before, but now I can't sync any of my music. All of my apps, pictures, contacts, everything syncs but my music. I've tried switching between sync all and sync selected. I've also uninstalled and reinstalled iTunes, restarted my computer, and reset my phone several times. I've run out of ideas... Any help is greatly appreciated. Thanks.