I’m having a little trouble figuring out what the issue is. I have lots of music purchased from iTunes and have no problem playing it with DPS. I’m currently on iOS 7.0.4, but didn’t have any issues with older iOS 7 releases. The message you refer to is 3 months old, the user hasn’t commented since, and no one from Bongiovi has actually acknowledged that it’s a problem. I suggest waiting for them to update the status here as posted in late September.