Play a specific part of a timeline

I have an image on the time line, it has 2 actions (Mouse enterandMouse leave)

On the Mouse enter I have this code :

sym.play("overmouse");
sym.stop("stop over");

and on Mouse leave I have this code :

sym.play("outmouse");
sym.stop("stop out");

And my timeline looks like this :

The problem I'm having is when I preview what I did in browser, and trigger the Mouse enter action it will right away go to stop over label without

enough time to view the transition effect between the overmouselabel and the stop over  label and the same happens for when I trigger the Mouse leave action.

What can I do to make it play from a label until it reaches a specific label I want and stop there ?