How do you use AVAudioPlayer to play music while in the background?

I curre开发者_开发问答ntly use AVAudioPlayer to play music while in the foreground, but when I press the home button my application goes to the background and the music stops. I set the category for my AVAudioSession to AVAudioSessionCategoryPlayback and set active to YES. Additionally, I added the audio key to UIBackgroundModes in my Info.plist.

Is there anything else I need to do to enable background music playback?

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There's apparently a bug in the simulator - it doesn't work there, while it works fine on the device.

(Edit: and by "doesn't work" I mean the sound stops when the app enters background, yet the player's status remains "playing" and it seems to keep "playing", although you can't hear it).