Nested Event Sounds - How To Play?

I have an event that has nested “Event Sound” in them. The event sounds fine when I audition them in fmod studio, but when I play (event_inst.Start()) in C++, I don’t hear anything. Is there something special I have to do in C++ to make these nested events play?

Also, create instances of each the nested “sound events” individual, and they all play fine…