about TweenMax

Good day

I am using the below TweenMax code as a trigger on the timeline and when the playhead reaches the trigger the boxtext element scrolls in but after the playhead leaves that trigger and then comes back this time boxtext does not scroll in it is visible but no tween

any assistants please let me know

var element = sym.$("boxtext");

TweenMax.to(element, 1.2, {css:{ x:26 },  ease:Circ.easeOut});

sym.stop();