Can't skip intro if press back on browser

[musicismything]

If you land on my site, there is a "Skip intro" button. Works fine unless you press back on the browser then come back to my site and try to skip intro. What could be cancelling the button's click code when returning to the site?

My site: www.mogulweb.com

Code on frame 1 (unrelated to button):
<code>
import mx.video.*;

stop();

var listenerObject:Object = new Object();
listenerObject.complete = function(eventObject:Object):Void {
gotoAndPlay(2);
};
my_FLVPlybk.addEventListener("complete", listenerObject);
my_FLVPlybk.contentPath = "http://www.mogulweb.com/mogul_web_intro_1.flv";
</code>

code on button:
<code>
on (release)
{
gotoAndPlay(2);
}
</code>