Using MouseOver to make a movie clip symbol appear

Hello All, 

I am really struggling at the moment with an HTML5 project in Animate 2021. I cannot get ANY of my MouseOver or MouseOut events to work. My timeline is playing fine and the project stops on the slide I indicated and the eyes01 movie symbol is not visible, however that is where the successes end. 

I need the movieclip eyes01 to appear when you hover over Topic1 then disappear when your mouse leaves Topic1. I have eyes01 on a layer above the buttons if that makes any difference whatsoever. I have tried making images come up when you hover over Topic1, tried to get it to gotoAndPlay a different frame when you hover, absolutely NONE of them work. Grrr...

Here is my code, PLEASE HELP!

this.stop();

this.eyes01.visible=false;

var frequency = 9;
stage.enableMouseOver(frequency);
this.Topic1.addEventListener("mouseover", fl_MouseOverHandler_6.bind(this));

function fl_MouseOverHandler_6()
{
this.eyes01.visible=true;
}

var frequency = 9;
stage.enableMouseOver(frequency);
this.Topic1.addEventListener("mouseout", fl_MouseOutHandler_2.bind(this));

function fl_MouseOutHandler_2()
{
this.eyes01.visible=false;
}

Thank you for your assistance!