Need help playing a movie clip on rollover

hi, i'm using code snippets in canvas , can't movieclip play when user rolls on invisible button.

 

my code on end frame (where movieclip , invisible button lives):

this.stop();

var frequency=3;

stage.enablemouseover(frequency);

this.button.addeventlistener("mouseover", fl_mouseoverhandler_32.bind(this));

function fl_mouseoverhandler_32()

{this.button.play();}

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