hmmm,
don't notice anything wrong. You say in your script you put that:
1. what script? the description.ext is where that info goes
2. are you sure donboy.ogg is in the mission folder, subfolder music?
Not intending to be a smarta** here, but sometimes people don't know where to put those commands/files, and sometimes, (me included), put things in the wrong place! I have fought a mission for days to discover something so simple as that as the problem!