[HELP] Problem to 'KILL ENEMY'

[CrazY.]

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

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;
	}
}
}