Interactive content not responding in browser.

Hello

I'm working on a piece of interactive content, but I'm having truble making it work in the browser.

I use the following code:

stage.enableMouseOver(30);

var _this = this;

_this.toej.on('mouseover', function(){

_this.toej.gotoAndPlay(50);

});

When I test the movie from Animate, using "control -> test movie" it works fine, but when I open the published html file from my file manager, it is no longer working.

There are two other interactive scripts in the same animation, and they both work fine when I open the published html file from the file manager on my pc.

Can anybody tell me where I might go wrong, or point me in the direction of a solution ?