How to configure multiple log4j appenders in JBoss

Issue

• How can I configure multiple log4j appenders in JBoss?
• We need two logging appenders, both time/date based rolling one and size based rolling one. Though I modified conf/jboss-log4j.xml like the following, I do not see server_size.log but only server-daily.log.

    <appender name="FILE" class="org.jboss.logging.appender.DailyRollingFileAppender">
       <param name="File" value="${jboss.server.log.dir}/server_daily.log"/>
       ...
    </appender>

    <appender name="FILE" class="org.jboss.logging.appender.RollingFileAppender">
       <param name="File" value="${jboss.server.log.dir}/server_size.log"/>
       ...
    </appender>

    <appender name="ASYNC" class="org.apache.log4j.AsyncAppender">
       <errorHandler class="org.jboss.logging.util.OnlyOnceErrorHandler"/>
       <appender-ref ref="FILE"/>
       ...
    </appender>