AS3 Project Error: 1087: Syntax error: Extra characters found...

Hello,

I'm using Adobe Animate 2018 to make a small platformer game to keep myself entertained when I'm bored.

Everything was alright, until I tried to add new levels. Whenever I run my game, it says this:

1087: Syntax error: Extra characters found after end of program.

It shows the error in another location, but here's the whole code including the problem area:

stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDownHandler);
stage.addEventListener(KeyboardEvent.KEY_UP, keyUpHandler);

if(e.keyCode == Keyboard.DOWN) ; {
downPressed = true;
if(doorOpen && player.hitTestObject(back.other.lockedDoor)){
nextLevel();
}
}

if(e.keyCode == Keyboard.RIGHT){
rightPressed = true;
}

if(e.keyCode == Keyboard.UP){
upPressed = true;
}

if(e.keyCode == Keyboard.DOWN){
downPressed = true;
}
}