@EventHandler
    public void ShotArrow(final ProjectileHitEvent bow) {
        if (bow.getEntity() instanceof Arrow) {
            final Arrow arrow = (Arrow)bow.getEntity();
            final org.bukkit.Location al = arrow.getLocation();
            final Entity shooter = (Entity)arrow.getShooter();
            Player p = (Player)shooter;
            p.sendMessage("ok1");
            if (shooter instanceof Player) {
                p.sendMessage("ok2");
                final Block b = bow.getHitBlock();
                if (b.getType() != Material.WOOL) return;
                p.sendMessage("ok3");
                b.setType(Material.AIR);
            }
        }
    }