I have never gotten sounds to work on the NXT. On v 0.4 I atleast got it to beep for the duration of the file, but on .5 I cannot even get it to play. How to I get the sounds to play? The file is about 35kb, 8bit mono at 64kHs sample rate and 64kbps bitrate. What do I need to do to the file to get it to play?