New to Compressor, what am I missing? No audio?

I know I'm new to Compressor, but what am I missing? I import my movie from FCP 6.0.5, I have every update, but when I add a "setting" and submit it (DVD:Best Quality 90 Minutes), a .m2v file is created, and when I open it, there is no sound? What am I missing? Am I choosing the wrong setting? Am I missing a plugin I am not aware of? I just want to create a movie that will fit on to a DVD. What am I doing wrong?