System.Exception: Could not initialize an instance of the type 'AVFoundation.AVAudioPlayer'

[gbolahanonamusi]

When trying to play .WAV files on iOS i get this exception:

System.Exception: Could not initialize an instance of the type 'AVFoundation.AVAudioPlayer': 
the native 'initWithContentsOfURL:fileTypeHint:error: ' method returned nil. It is possible to 
ignore this condition by setting MonoTouch.ObjCRuntime.Class.ThrowOnInitFailure to false. occurred