[HELP] Problem to 'KILL ENEMY'

Hey, I'm having a problem to remove the enemy's life when the bullet hit him, some help to fix?

Code:

---

function addEnemy():Void
{
        enemy_mc.enemyHealth = 100;
}

addEnemy();

function createBullet():Void
{
for (var i=0; i<enemyArray.length; i++)
{
        _enemy_mc = eval(enemyArray[i]);
                               
        if (this.hitTest(_enemy_mc))
        {
                this.removeMovieClip();
                enemy_mc.enemyHealth -= 10;
        }
}
}

---

see this thread. it is about coins, but hero picking up coins is the same thing as enemy picking up bullets.