Cannot hear audio in Presenter 13 course

Hello.  One of my clients is having an issue hearing audio files in a published Presenter 13 course.  She has an updated version of flash and she can hear .mp3 files being played through a flash player and through a javascript player, but she cannot hear the audio in the course.  The course has been published for SCORM 1.2.  I am able to hear the audio on my computer. 

Can anyone offer any suggestions on what the issue could be?  Please let me know if I need to provide more details.

Thank you!

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