Help understanding the nature of this 1006 and 1009 errors?

Hi,

I am working in Flash Professional CC, testing an old game with two levels and a win and lose screen. The game works until you get to the second level scene.  Once you're there, the 1006 output errors appear.

TypeError: Error #1006: removeChild is not a function.

    at final_project_2_fla::golem_22/onHealth()[final_project_2_fla.golem_22::frame1:6]

removeChild( ) is only used in the golem health function which it is referencing., so I know the problem's probably there. Thing is, I don't know why Flash is telling me I'm using removeChild as a function or why a sixth frame is being reference. Unless that's a code line references?

Here's the code from the enemy I was talking about.

var health:int=4;

this.addEventListener(Event.ENTER_FRAME,onHealth);

function onHealth(evt:Event):void{

    if(health==0){

        this.removeEventListener(Event.ENTER_FRAME,onHealth);

        Object(parent).removeChild(this);

    }

}

Also, when you beat the game you get this error

TypeError: Error #1009: Cannot access a property or method of a null object reference.

    at final_project_2_fla::MainTimeline/onLoop2()[final_project_2_fla.MainTimeline::frame4:27]

I read up on the 1006 error because it's really common. I know the steps begin with tracing something, but I'm not sure what to begin tracing because it's referencing the function, but I think it's refencing the 27th line of a fourth frame? Which doesn't make sense because I don't have a fourth frame there.

Here's the onLoop2 function, if it will help out

function onLoop2(evt:Event):void {

    charMove();

    if(char.hitTestObject(bgr.page1)){

        bgr.page1.visible=false;

        uipage1.visible=true;

        removeListeners2();

        echannel=ff.play(0,1);

        gotoAndStop(1, "win");

    }

    ///collision with golem 1

    if(char.hitTestObject(bgr.golem)){

        trace(attack);

        if(attack){

            bgr.golem.x+=50;

            bgr.golem.health--;

            attack=false;

        }else{

            if(bgr.golem.arms.currentFrameLabel=="idle"){

                bgr.golem.arms.gotoAndPlay("attack");

            }

            health-=5;

            bgr.x+=10;

        }

    }

        if(health<75){

                hp4.visible=false;

            }

            if(health<50){

                hp3.visible=false;

            }

            if(health<25){

                hp2.visible=false;

            }

            if(health<1){

                hp1.visible=false;

                removeListeners2();

                gotoAndStop(1, "lose");

            }

    Thank you for your time and effort.