Problems targeting function within MC

Hullo, I am trying to start and stop an animation from outside of the main timeline. I have written the functions inside the movie to start and stop the animation and they work fine when called from within the movieclip but when I call them from the maim timeline I get nothing. I have checked the targeting is correct and can’t think what this is!
If anyone could help I would be really really grateful.
I’ve attached an fla to show you what i mean!
Thanks

Schm