Help with AS 3.0 on mouse over & mouse click

Hello everyone,
It has been a long time since I have worked with Flash, the last time was when AS 3.0 first came out and I am trying to remember how to write some simple actionscript 3.0 code, but it does not seem to be working. And I was hoping someone could help me with it.

I have a symbol, which is a button, named map_btn and when the mouse is over map_btn, I want it to play from scene 59.

And when the mouse clicks on map_btn , I want to open in the browser.

Here is the code I have so far, can someone tell me how to properly write what I explained above and what I am doing wrong in what I wrote below?

The stop is because there is an intro video before.

/*onHover actions*/
map_btn.addEventListener(MouseEvent.MOUSE_OVER, mapsHover);

function mapsHover():void

/* onClick actions */
var url:String = '';
map_btn.addEventListener(MouseEvent.CLICK, goToMaps);
function goToMaps():void
      var request:URLRequest = new URLRequest(url);
      try {
            navigateToURL(request, '_blank');
      } catch (e:Error) {
            trace('An error occurred');

I would really appreciate any help with this.

Thanks in Advance & Best Regards,
Team 1504

A symbol that is a button only has 4 frames