Event Function not showing up in UMotion - Animation Event dialogue box

I'm trying to create the foot steps example in the Tutorial video.  I have created a void function that will play an audio file of a foot step.  I've placed the script in Assets>Editor and even tried Assets>Scripts.  In either case, the foot steps script doesn't appear in the list of choices available in the Animation Event dialogue box.  I see plenty of others in there like Start(void), TestRunnerCoroutine(void), Run(void), Cleanup(void), etc.  however my foot steps script is not there.

Thanks.