However I am curious why there is no sound. There should be sound, it should be playing Lumina.aac which is in your ringtones folder (/home/user/MyDocs/.sounds/Ringtones/Lumina.aac). Please check your sound and volume settings, I have written the app so the loudness is controlled by the volume up/down buttons on the side of the n900. If you still can't hear anything we might have a proper bug so please let me know so i can look at it.