URL linking problems

Ihave made some buttons using movieclips but even if i click on anything on the flash part in html it loads up one of the thing ie. yahoo.com evn if i click on butt4 which is google it still does it???


[LEFT]butt1.onRollOver = over;
butt1.onRollOut = out;
butt1.onMouseDown = function()
{
getURL('http://www.yahoo.com');
}
butt1.text.buttonText.text = "Chassis ";[/LEFT]
 
 
[LEFT]butt2.onRollOver = over;
butt2.onRollOut = out;
butt2.onMouseDown = function()
{
getURL('http://www.yahoo.com');
}
butt2.text.buttonText.text = "PARTS ";[/LEFT]
 
[LEFT]butt3.onRollOver = over;
butt3.onRollOut = out;
butt3.onMouseDown = function()
{
getURL('http://www.karting.co.uk');
}
butt3.text.buttontext.text= "Accessories ";[/LEFT]
 
[LEFT]butt4.onRollOver = over;
butt4.onRollOut = out;
butt4.onMouseDown = function()
{
getURL('http://www.google.com');
}
butt4.text.buttontext.text= "About US ";[/LEFT]
 
[LEFT]function over() {
this.gotoAndPlay(2);
}[/LEFT]
 
[LEFT]function out() {
this.gotoAndPlay(1);
}[/LEFT]

Any Help?