collision detection: custom class and array

so I'm making a top-down shooter for fun, but have been struggling as I'm new to programming,

I have

var player: Player = new Player();

var Enemies: Array = new Array();

now I've been looking all over the net, but this is what I've been trying to work with.

                                public function checkCollisionWithShip(): void {

                                                for (var e = Enemies.length - 1; e >= 0; e--) {

                                                                if (Enemies.hitTestObject(player)) {

                                                                                trace(Enemies);

                                                                                Lives -= 1;

                                                                                updateUI();

                                                                                trace("ship collision!");

                                                                }

                                                }

                                }

However, everytime my ship(player) touches an enemy, nothing ever happens.

looking forward to your replies,

thanks a lot for your time.