loadSound doesn't work on Pocket PC

I'm trying to dynamically load an MP3 file into my flash movie on an iPAQ 3800 pocket PC. Everything seems to work fine. I don't get any error messages but the file doesn't play. If I use a getURL statement the Windows Media Player will open and the file will play. ie:

getURL("file:///My%20Documents/song.mp3");

This works but I want it to play in my flash movie. ie:

var mySong = new sound();
mySong .loadSound("file:///My%20Documents/song.mp3");
mySong .start(0,999);

Can anyone tell me how to make this work? Thanks in advance.

i'm not sure if it's just a syntax problem... but when i typed the 2nd line this way, the mp3 does load.

mySong.loadSound("C:/Documents and Settings/Administrator/My Documents/song.mp3");

i didn't even need to use the "file:///", though it didn't seem to hurt.

eta: i did the testing on a regular bulky pc, as i didn't have a pocket pc. so, i wouldn't know if that same code will work on them.

Thanks for the reply DKKZ. I guess I should have said right up front that I didn't have a problem running this on the PC. The problem seems to only be on the Pocket PC.