Noob Disappearing Buttons Problem

programming flash
1

Here is the site I’m working on http://thedogparticle.com/

fla file http://thedogparticle.com/Flash/Drop_Down_mine.rar

As you can see the buttons disappear before you get to hit them which I guess has something to do with the invisible button behind them and the actionscript controlling it.

invis btn code


function invisClip1Over(event:MouseEvent):void { 
gotoAndStop(1);
}
invisiClip.addEventListener(MouseEvent.ROLL_OVER, invisClip1Over);

The rest of my code



function main1Click(event:MouseEvent):void { 
var main1URL:URLRequest = new URLRequest("http://thedogparticle.com");
navigateToURL(main1URL, "_self"); 
}
mainBtn1.addEventListener(MouseEvent.CLICK, main1Click);

function main2Click(event:MouseEvent):void { 
var main2URL:URLRequest = new URLRequest("http://thedogparticle.com/god-particle.html");
navigateToURL(main2URL, "_self"); 
}
btn2sub1.addEventListener(MouseEvent.CLICK, main2Click);

function main3Click(event:MouseEvent):void { 
var main2URL:URLRequest = new URLRequest("http://thedogparticle.com/contact.html");
navigateToURL(main2URL, "_self"); 
}
btn1sub2.addEventListener(MouseEvent.CLICK, main3Click);

function main4Click(event:MouseEvent):void { 
var main2URL:URLRequest = new URLRequest("http://thedogparticle.com/info.html");
navigateToURL(main2URL, "_self"); 
}
btn1sub1.addEventListener(MouseEvent.CLICK, main4Click);

function main5Click(event:MouseEvent):void { 
var main1URL:URLRequest = new URLRequest("http://thedogparticle.com/god-Imp.html");
navigateToURL(main1URL, "_self"); 
}
btn2sub2.addEventListener(MouseEvent.CLICK, main5Click);

function main6Click(event:MouseEvent):void { 
var main1URL:URLRequest = new URLRequest("http://thedogparticle.com/art-galley.html");
navigateToURL(main1URL, "_self"); 
}
btn3sub1.addEventListener(MouseEvent.CLICK, main6Click);

function main7Click(event:MouseEvent):void { 
var main1URL:URLRequest = new URLRequest("http://thedogparticle.com/for-sale.html");
navigateToURL(main1URL, "_self"); 
}
btn3sub2.addEventListener(MouseEvent.CLICK, main7Click);

function main8Click(event:MouseEvent):void { 
var main1URL:URLRequest = new URLRequest("http://thedogparticle.com/dog-particle.html");
navigateToURL(main1URL, "_self"); 
}
btn4sub1.addEventListener(MouseEvent.CLICK, main8Click);

function main9Click(event:MouseEvent):void { 
var main1URL:URLRequest = new URLRequest("http://thedogparticle.com/dog-galley.html");
navigateToURL(main1URL, "_self"); 
}
btn4sub2.addEventListener(MouseEvent.CLICK, main9Click);

function main1Over(event:MouseEvent):void { 
gotoAndPlay("down1");
}
function main2Over(event:MouseEvent):void { 
gotoAndPlay("down2");
}
function main3Over(event:MouseEvent):void { 
gotoAndPlay("down3");
}
function main4Over(event:MouseEvent):void { 
gotoAndPlay("down4");
}

mainBtn1.addEventListener(MouseEvent.ROLL_OVER, main1Over);
mainBtn2.addEventListener(MouseEvent.ROLL_OVER, main2Over);
mainBtn3.addEventListener(MouseEvent.ROLL_OVER, main3Over);
mainBtn4.addEventListener(MouseEvent.ROLL_OVER, main4Over);

thanks