I had the exact same problem. It's this bit.
Code:
set %r1 $findfile(%mp3dir,*.mp?,0)

That script randomizes mp? files in your mp3 directory so it could try and play an mpg file or mpeg. Change the question mark to the number 3.
Like this.
Code:
set %r1 $findfile(%mp3dir,*.mp3,0)


It worked for me. grin