Help with Music Change?

Which monster formation # is it, and what is the circumstance of the battle? Is it a random battle you have set up into a monster pack somewhere? Are you sure your doing it for the right formation?? It -should- work. You got the music flag checked and its set at boss theme, and you save? When you close/reopen the editor is it saved at the boss music still? Sounds to me like you are setting it to the wrong formation, or calling the wrong formation for the battle. That, or its not saving. Double check both 100% please, and come back to me. =)