Having problems with audio in background of animation

Hi everybody! I am trying to create a "following the bouncing ball " with the lyrics of her children song I wrote. The instrumentation for the song plays in the background. It plays fine when I play it through. I currently have the background, text, and the song in the project and I'm now looking to add the bouncing ball.  As I'm sure you understand this requires stopping and starting the clip quite frequently. Problem is once I stop the clip if I try to start it again you can't hear the audio. I literally have to completely shut Animate down and re-open Animate and the project before it will play. It will take me the rest of my life to do this  if I have to shut down and reboot the program every time I want to add a key frame. Any help on why this is happening would be greatly appreciated. Thank you!