[Help] Terrain (SOB) spawning...

heya.... i'm trying to make the guild war...
aa... using 5181 impulse's source...

i'm making the spawning but i keep geting the same F#!@#% thing wrong...

i would like some help if possible... here is the spawning:
Spoiler
Code:
  public enum SOBType : ushort
    {
        Gate = 0x1A,
        Scarecrow = 0x16,
        Stake = 0x15,
        Pole = 0x0A
    }
    public enum SOBMesh : ushort
    {
        LeftGate = 0x00F1,
        RightGate = 0x0115,
        Pole = 0x471
    }
    public class Terrain : Writer, Interfaces.IPacket, Interfaces.ITerrain, Interfaces.IMapObject
    {
        private byte[] Buffer;
        private ushort _MapID;
        private Conquer_Online_Server.Game.Enums.ConquerAngle _Facing;
        private string _name = "";

        public Terrain(string setName)
        {
            _name = setName;
            Buffer = new byte[8 + 36 + setName.Length];
            WriteUInt16((ushort)(Buffer.Length - 8), 0, Buffer);
            WriteUInt16(0x455, 2, Buffer);
        }

        public uint UID
        {
            get { return BitConverter.ToUInt32(Buffer, 4); }
            set { WriteUInt32(value, 4, Buffer); }
        }

        public uint MaxHitpoints
        {
            get { return BitConverter.ToUInt16(Buffer, 8); }
            set { WriteUInt32(value, 8, Buffer); }
        }

        public uint HitPoints
        {
            get { return BitConverter.ToUInt16(Buffer, 12); }
            set { WriteUInt32(value, 12, Buffer); }
        }

        public ushort X
        {
            get { return BitConverter.ToUInt16(Buffer, 16); }
            set { WriteUInt16(value, 16, Buffer); }
        }

        public ushort Y
        {
            get { return BitConverter.ToUInt16(Buffer, 18); }
            set { WriteUInt16(value, 18, Buffer); }
        }

        public SOBMesh Type
        {
            get { return (SOBMesh)BitConverter.ToUInt16(Buffer, 20); }
            set { WriteUInt16((ushort)value, 20, Buffer); }
        }

        public SOBType Flag
        {
            get { return (SOBType)BitConverter.ToUInt16(Buffer, 22); }
            set { WriteUInt16((ushort)value, 22, Buffer); }
        }

        public byte NameLength
        {
            get { return Buffer[27]; }
            set { WriteByte(value, 27, Buffer); }
        }

        public string Name
        {
            get { return _name; }
            set 
            {
                _name = value;
                Buffer = new byte[8 + 36 + _name.Length];
                WriteUInt16((ushort)(Buffer.Length - 8), 0, Buffer);
                WriteUInt16(0x455, 2, Buffer);
                WriteUInt16(11, 24, Buffer);
                WriteByte(1, 26, Buffer);
                NameLength = (byte)_name.Length; 
                WriteString(value, 28, Buffer);
            }
        }

        public ushort MapID
        {
            get { return _MapID; }
            set { _MapID = value; }
        }

        public Conquer_Online_Server.Game.MapObjectType MapObjType
        {
            get { return Conquer_Online_Server.Game.MapObjectType.Terrain; }
        }
        public Client.GameState Owner { get { return null; } }
        public Game.Enums.ConquerAngle Facing { get { return _Facing; } set { _Facing = value; } }
        public void SendSpawn(Client.GameState client, bool checkScreen)
        {
            if (client.Screen.Add(this) || !checkScreen)
            {
                client.Send(Buffer);
            }
        }

        public void SendSpawn(Client.GameState client)
        {
            SendSpawn(client, false);
        }

        public byte[] ToArray()
        {
            return Buffer;
        }

        public void Deserialize(byte[] buffer)
        {
            Buffer = buffer;
        }

        public void Send(Client.GameState client)
        {
            SendSpawn(client, false);
        }
    }
and i'm making this as the npc:
Spoiler
and keep geting this (take a look at the screenshot):
Spoiler
thanks in advance...
:D