WKAudioFilePlayer Beta 6 - Crashing test app

Attempting to learn how to play a sound on the watch. I created a test app (single view) on the phone and added the Watchkit extention to it. The only thing I put on the watch is a button. When the button is pressed, it will play the sound. I have the same sound on the phone part of the test app, and it plays the sound without issue, so I know the sound file is fine. The goal of this exercise it to have the sound played, without a "player" showing up. In any real apps that I make, the user will not be touching the device for the sound to be played. (From what I've read, the WKInterfaceMovie will play sounds, but it opens up a player, which is not what I'm looking for). Am I not using the correct feature to play sounds, is there something missing from the code below, or is this just a bug that hasn't been addressed yet?

class InterfaceController: WKInterfaceController {
    var player: WKAudioFilePlayer!
    @IBAction func buttonPlay() {
        let filePath = NSBundle.mainBundle().pathForResource("SpeakMinder2", ofType: "wav")!
        let fileUrl = NSURL.fileURLWithPath(filePath)
        let asset = WKAudioFileAsset(URL: fileUrl)
        let playerItem = WKAudioFilePlayerItem(asset: asset)
       
        player = WKAudioFilePlayer(playerItem: playerItem) // This is where it crashes
        player.play()
    }
   
    override func willActivate() {
        /
        super.willActivate()
    }
    override func didDeactivate() {
        /
        super.didDeactivate()
    }
   
    override func awakeWithContext(context: AnyObject?) {
        super.awakeWithContext(context)
       
        /
    }
}

On the simulator for Watch, I get "Program ended with exit code 0", and on the actual device it just dies after hitting the button. The sound file was copied to the Watch Extension group.