Keyboard Event Isn't Working, and don't know why.

Question

I am creating a game where you have to use the up and down buttons on the keyboard to avoid movie clips. For some reason it won't register when i press the keys down.
If anyone has any insight as to why it would be greatly appreciated.
Here is my code:
stop();
var Santas:Number = 5;
var keyDown1:Boolean = false;
var keyUp1:Boolean = false;
stage.focus = this;
function randomValue()
    return Math.round(Math.random() * 500);
stage.addEventListener(Event.ENTER_FRAME, loop);
stage.addEventListener(KeyboardEvent.KEY_DOWN,keyDownEvent);
stage.addEventListener(KeyboardEvent.KEY_UP, keyUpEvent );
function keyDownEvent(myevent:KeyboardEvent)
    if (myevent.keyCode == Keyboard.UP)
        keyUp1 = true;
    if (myevent.keyCode == Keyboard.DOWN)
        keyDown1 = true;
function keyUpEvent(myevent:KeyboardEvent)
    if (myevent.keyCode == Keyboard.UP)
        keyUp1 = false;
    if (myevent.keyCode == Keyboard.DOWN)
        keyDown1 = false;
function loop(myevent:Event)
    score_txt.text = "Santas Left: " + String(Santas);
    cane1_mc.x +=  4;
    if (cane1_mc.x > 550 && cane1_mc.y > 0)
        cane1_mc.x = -10;
        cane1_mc.x = randomValue();
    cane2_mc.x +=  3;
    if (cane2_mc.x > 550 && cane2_mc.y > 0)
        cane2_mc.x = -10;
        cane2_mc.x = randomValue();
    cane3_mc.x +=  3;
    if (cane3_mc.x > 550 && cane3_mc.y > 0)
        cane3_mc.x = -10;
        cane3_mc.x = randomValue();
    lake1_mc.x +=  4;
    if (lake1_mc.x > 550 && lake1_mc.y > 0)
        lake1_mc.x = -10;
        lake1_mc.x = randomValue();
    lake2_mc.x +=  3;
    if (lake2_mc.x > 550 && lake2_mc.y > 0)
        lake2_mc.x = -10;
        lake2_mc.x = randomValue();
    mountain_mc.x +=  3;
    if (mountain_mc.x > 550 && mountain_mc.y > 0)
        mountain_mc.x = -10;
        mountain_mc.x = randomValue();
    if (keyDown1 && santa_mc.y > 351.10)
        santa_mc.y -=  2;
    //trace(keydown)
    if (keyUp1 && santa_mc.y < 25.10)
        santa_mc.y +=  2;
    //trace(keyup)
    if (santa_mc.hitTestObject(cane1_mc))
        Santas--;
        cane1_mc.x = -550;
    if (santa_mc.hitTestObject(cane2_mc))
        Santas--;
        cane2_mc.x = -550;
    if (santa_mc.hitTestObject(cane3_mc))
        Santas--;
        cane3_mc.x = -550;
    if (santa_mc.hitTestObject(lake1_mc))
        Santas--;
        lake1_mc.x = -550;
    if (santa_mc.hitTestObject(lake2_mc))
        Santas--;
        lake2_mc.x = -550;
    if (santa_mc.hitTestObject(mountain_mc))
        Santas--;
        mountain_mc.x = -550;
    if (Santas == 0)
        gotoAndStop(3);

Answer 1

That doesn't change anything.
Now don't know if this has anything to do with it but i have the flash layed out with 3 frames one for a intro screen and another for when you run out of lives and they both have buttons on them.