System.Exception: Items array is null--are you calling the serialization constructor? Type=Server.Misc.DoomSecretRoom+DoomBox
   at Server.Item.set_Map(Map value)
   at Server.Item.AddItem(Item item)
   at Server.Items.Container.DropItem(Item dropped)
   at Server.Mobile.Kill()
   at Server.Mobile.Damage(Int32 amount, Mobile from)
   at Server.Mobiles.BaseCreature.Damage(Int32 amount, Mobile from)
   at Server.AOS.Damage(Mobile m, Mobile from, Int32 damage, Int32 phys, Int32 fire, Int32 cold, Int32 pois, Int32 nrgy, Boolean keepAlive)
   at Server.AOS.Damage(Mobile m, Mobile from, Int32 damage, Int32 phys, Int32 fire, Int32 cold, Int32 pois, Int32 nrgy)
   at Server.Items.BaseWeapon.OnHit(Mobile attacker, Mobile defender)
   at Server.Items.BaseSpear.OnHit(Mobile attacker, Mobile defender)
   at Server.Items.BaseWeapon.OnSwing(Mobile attacker, Mobile defender)
   at Server.CombatTimer.OnTick()
   at Server.Timer.Slice()
   at Server.Core.Main(String[] args)