Make 2 peds fight each other

prismspecs

I've followed so many guides and can't for the life of me make 2 peds fight one another.

if (e.KeyCode == Keys.NumPad3)
    {
        UI.ShowSubtitle("test 3");

        Ped player = Game.Player.Character;
        GTA.Math.Vector3 spawnLoc = player.Position + (player.ForwardVector * 5f);

        int RELATIONSHIP_PROTESTERS = World.AddRelationshipGroup("PROTESTERS");
        int RELATIONSHIP_COP = Function.Call<int>(Hash.GET_HASH_KEY, "COP");

        World.SetRelationshipBetweenGroups(Relationship.Hate, RELATIONSHIP_COP, RELATIONSHIP_PROTESTERS);
        World.SetRelationshipBetweenGroups(Relationship.Hate, RELATIONSHIP_PROTESTERS, RELATIONSHIP_COP);

        string model_name = "s_m_y_cop_01";
        Ped cop1 = GTA.World.CreatePed(model_name, spawnLoc);
        Ped cop2 = GTA.World.CreatePed(model_name, spawnLoc);
        cop1.RelationshipGroup = RELATIONSHIP_PROTESTERS;
        cop2.RelationshipGroup = RELATIONSHIP_COP;

        cop1.Task.FightAgainstHatedTargets(5);
        cop2.Task.FightAgainstHatedTargets(5);

    }