@EventHandler
    public void worldLoad(FMLServerStartingEvent e)
    {
        World w = e.getServer().getEntityWorld();
        GameRules g = w.getGameRules();
        String pos = "CustomPosSpawner";
        String readpos = "CustomPosSpawnerReading";
        ValueType type = GameRules.ValueType.BOOLEAN_VALUE;
        g.addGameRule(pos, "true", type);
		g.addGameRule(readpos, "true", type);
    }