Help❗ Can't add a custom map

using wServer.networking;

namespace wServer.realm.worlds
{
    public class ElementalGolems : World
    {
        public ElementalGolems()
        {
            Name = "Sand Golem Lair";
            ClientWorldName = "Sand Golem Lair";
            Background = 0;
            Difficulty = 5;
            AllowTeleport = false;
        }

        protected override void Init()
        {
            LoadMap("wServer.realm.worlds.maps.elementalgolems.wmap", MapType.Wmap);
        }

        public override World GetInstance(Client psr)
        {
            return Manager.AddWorld(new ElementalGolems());
        }
    }
}