log4net non salva nel DB

[mexican]

Ciao a tutti, sto cercando di salvare il log usando log4net nel database

Ho installato log4net dalla gestione pacchetti
Poi nel web config ho inserito:

<configSections>    
    <!-- Log4Net -->
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
  </configSections>

<log4net>

    <!--AdoNet appender is use for write log file into sql server-->

    <appender name="AdoNetAppender" type="log4net.Appender.AdoNetAppender">

      <bufferSize value="1000" />

      <connectionType value="System.Data.SqlClient.SqlConnection, System.Data, Version=1.0.3300.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />

      <connectionString value="data source=localhost/SVILUPPO;Initial Catalog=MIODB;user id=sa;password=myPassword;" />

      <commandText value="INSERT INTO AppLog ([Date],[Thread],[Level],[Logger],[Message],[Exception]) VALUES (@log_date, @thread, @log_level, @logger, @message, @exception)" />

      <parameter>
        <parameterName value="@log_date" />
        <dbType value="DateTime" />
        <layout type="log4net.Layout.RawTimeStampLayout" />
      </parameter>

      <parameter>
        <parameterName value="@thread" />
        <dbType value="String" />
        <size value="255" />
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%thread" />
        </layout>
      </parameter>

      <parameter>
        <parameterName value="@log_level" />
        <dbType value="String" />
        <size value="50" />
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%level" />
        </layout>
      </parameter>

      <parameter>
        <parameterName value="@logger" />
        <dbType value="String" />
        <size value="255" />
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%logger" />
        </layout>
      </parameter>

      <parameter>
        <parameterName value="@message" />
        <dbType value="String" />
        <size value="4000" />
        <layout type="log4net.Layout.PatternLayout">
          <conversionPattern value="%message" />
        </layout>
      </parameter>

      <parameter>
        <parameterName value="@exception" />
        <dbType value="String" />
        <size value="2000" />
        <layout type="log4net.Layout.ExceptionLayout" />
      </parameter>

    </appender>

    <!--Add appender which you want to use, You can add more then one appender . Like if you want save log both plain text or sql server ,Add both appender.-->

    <root>
      <level value="ALL" />
      <appender-ref ref="AdoNetAppender" />
      <!--Enable this line if you want write log file into sql server-->
    </root>

  </log4net>

nel global.asax ho inserito in Application_Start:
log4net.Config.XmlConfigurator.Configure();

E nella pagina dove voglio loggare:

private static ILog log = LogManager.GetLogger(typeof(Login));

log.Debug("Debug message");
log.Warn("Warn message");
log.Error("Error message");
log.Fatal("Fatal message");

Però non mi salva niente cosa manca?