/// <summary>
        /// Updates mailserver core settings (ports,database type, ...).
        /// </summary>
        /// <param name="dsSettings"></param>
        /// <returns></returns>
        public void UpdateSettings(DataSet dsSettings)
        {
            switch(m_DB_Type)
            {
                #region DB_Type.WebServices

                case DB_Type.WebServices:
                    using(RemoteAdmin eng = new RemoteAdmin()){
                        _Core.InitWebService(m_WebServicesUrl,m_WebServicesPwd,m_WebServicesUser,eng);

                        eng.UpdateSettings(dsSettings);
                    }
                    break;

                #endregion

                default:
                    if(dsSettings != null && dsSettings.Tables.Contains("Settings")){
                        dsSettings.WriteXml(m_DataPath + "Settings.xml",XmlWriteMode.IgnoreSchema);

                        // If DB_Type changed to XMl, we need to reload Users, ...
                        DB_Type dbT = (DB_Type)Enum.Parse(typeof(DB_Type),dsSettings.Tables["Settings"].Rows[0]["DataBaseType"].ToString());
                        if(dbT != m_DB_Type && dbT == DB_Type.XML){
                            LoadUsers();
                            LoadAliases();
                            LoadRouting();
                            LoadDomains();
                            LoadSecurity();
                        }
                    }
                    break;
            }
        }