Empty NHibernate log file with log4net

Question

I am trying to activate logging in my application using Fluent NHibernate and log4net. I tried the ones described here here , here , here and here . A log file is created, but nothing is written to it. In the other log files for this and other applications, all seams work fine, so I assume the problem is with my configuration.

Here is the code I put in to try to get this to work:

A section of the configuration file with all the parameters of my log4net related to this APP:

<appender name="RollingFileAppenderNHibernate"
        type="log4net.Appender.RollingFileAppender">
    <file value="C:\temp\RollingLogFileNHibernate" />
    <appendToFile value="true" />
    <ImmediateFlush value="true" />
    <rollingStyle value="Date" />
    <DatePattern value="yyyyMMdd.\l\o\g" />
    <StaticLogFileName value="false" />
    <MaxSizeRollBackups value="1" />
    <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
    </layout>
</appender>
<logger name="NHibernate.SQL"
        additivity="false">
    <level value="ALL"/>
    <appender-ref ref="RollingFileAppenderNHibernate"/>
</logger>

My NHibernate configuration:

public static ISessionFactory CreateSessionFactory()
{
    return Fluently.Configure()
        .Database(OracleClientConfiguration.Oracle10
        .ConnectionString((conn =>
            conn.FromConnectionStringWithKey("APPDB")))
        .ShowSql())
        .Mappings(m =>
            m.FluentMappings.AddFromAssemblyOf<{ObjectName}>())
        .BuildSessionFactory();
}

In Application_Start () of my Global.asax.cs:

log4net.Config.XmlConfigurator.Configure();

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