Thanks greensock for the tips,
I have tested like this and work fine:
import com.greensock.*;
import com.greensock.easing.*;
addEventListener(Event.ENTER_FRAME, lancement);
function lancement(e:Event):void{
if (mouseX>=275){
TweenMax.to(plante, 1.1, {frame:82});
}
if (mouseX<275){
TweenMax.to(plante, .5, {frame:1});
}
}
stop();
Thanks