Flash 8 simple collision not working

1

Hi,
I am creating a simple game in flash 8.[URL=“http://force10x.freehostia.com/flash/game_v2.zip”]

I dont have much skills in programming hence help required.

I have a game where users can drag and drop elements to build something.

when the user drags a part, on hitTest, that part becomes invisible while the other one becomes visible.
I tried removing the movie clip but that wont work.

here is my code



stop();


this.onEnterFrame = function():Void{
    makeFinalPipeInvisible();
    checkPipePlacement();
}



//start dragging pipe peice 01
this.pipe01_mc.onPress = function():Void {
    trace("it");
    startDrag(this);
}
this.pipe01_mc.onRelease = function():Void {
    
    this.stopDrag();
}


//start dragging pipe piece 01
this.pipe01_mc.onPress = function():Void {
    trace("it");
    startDrag(this);
}
this.pipe01_mc.onRelease = function():Void {
    
    this.stopDrag();
}




//start dragging pipe peice 01
this.pipe02_mc.onPress = function():Void {
    trace("2");
    startDrag(this);
}
this.pipe02_mc.onRelease = function():Void {
    
    this.stopDrag();
}



//Functions start here ***


//This one sets the initial final pipe to invisible
function makeFinalPipeInvisible():Void{
    this.finpipe01_mc._visible = false;
    this.finpipe02_mc._visible = false;
    this.finpipe03_mc._visible = false;
    this.finpipe04_mc._visible = false;
    this.finpipe05_mc._visible = false;
    this.finpipe06_mc._visible = false;
    this.finpipe07_mc._visible = false;
    this.finpipe08_mc._visible = false;
    this.finpipe09_mc._visible = false;
}

//Checks for hit test and makes final piece visible
function checkPipePlacement():Void {
    
    if (this.pipe01_mc.hitTest(this.finpipe01_mc)){
        this.finpipe01_mc._visible = true;
        this.pipe01_mc._visible = false;
        
    }else if (this.pipe02_mc.hitTest(this.finpipe02_mc)){
        this.finpipe02_mc._visible = true;
        this.pipe02_mc._visible = false;
    }else if (this.pipe09_mc.hitTest(this.finpipe09_mc)){
        this.finpipe09_mc._visible = true;
        this.pipe09_mc._visible = false;
        trace("game over");
    }
        
    
}

A shove in the right direction would do a lot good.

thank you.

here is the fla