Recorded Favorite Doesn't Work

I'm using Audition CC 10.0.2 but that shouldn't matter.  I've recorded a simple favorite that consists solely of Effects/Silence.  The work I'm doing is voiceovers and I just want to be able to get rid of extraneous noise in the gaps between my speech.

The only way this script works at all is if I open the Action list box and change "Selection" to "Relative" for each action.  The actions are:

Silence

<Final Selection>

"Works at all" means I can run the script without getting an error message.  But the noise is still there.  I feel like an idiot asking this, so please be gentle with me.

Thanks,

Tony