Hello Sarawr123. apart from making sure you are using the path media/audio/notifications on the sd card you will also want to be sure that the file is an acceptable file format like mid, .mp3, .ogg, .wav, or .wma. if you have used the Myxer app, you may want to try removing it to see if that helps, many people who use android phones have had trouble after using myxer and have had to reset their ph