AS 3.0 Problem - Please help

programming flash
1

I’m making a calculator in Flash CS3 using actionscript 3.0.

It has the Multiply, Divide, Plus & Minus buttons.
When i input the code for one button, that button works, but when i input the code for more than one, none of the buttons work.
**What am I doing wrong? **

Download Calculate.fla

MinusButton_btn.addEventListener(MouseEvent.CLICK, doMyCalculation); 

function doMyCalculation(e:MouseEvent):void 
{ 
    var total : Number; 

    // PROCESS 
    total = Number(N1.text)-Number(N2.text); 

    // OUTPUT 
    total.text = String(myAnswer); 
}; 

MultiplyButton_btn.addEventListener(MouseEvent.CLICK, doMyCalculation); 
{ 
    var total : Number; 

    // PROCESS 
    total = Number(N1.text)*Number(N2.text); 

    // OUTPUT 
    total.text = String(myAnswer); 
}; 

DivideButton_btn.addEventListener(MouseEvent.CLICK, doMyCalculation); 
{ 
    var total : Number; 

    // PROCESS 
    total = Number(N1.text)/Number(N2.text); 

    // OUTPUT 
    total.text = String(myAnswer); 
}; 

PlusButton_btn.addEventListener(MouseEvent.CLICK, doMyCalculation); 
{ 
    var total : Number; 

    // PROCESS 
    total = Number(N1.text)+Number(N2.text); 

    // OUTPUT 
    total.text = String(myAnswer); 
}

Thanks guys :ne: