How to use log4j.jdbcplus.JDBCAppender in log4j.xml

Can somebody please help me with an example?
My log4j.xml works in netbeans, and it saves everything in the files, but I'm unable to store the log data in the table I created on MySQL Database.

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

<appender name="CSL" class="org.apache.log4j.ConsoleAppender">
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern"
                value="%p - %C{1}.%M(%L) | %m%n"/>
        </layout>
    </appender>

<appender name="XML" class="org.apache.log4j.DailyRollingFileAppender">
        <param name="File" value="/home/marcelo/logfile.xml"/>
        <param name="DatePattern" value="'.'yyyy-MM-dd"/>
        <param name="Append" value="true"/>
        <param name="Threshold" value="debug"/>
        <layout class="com.alfa1lab.logger.util.CustomizedXMLLayout" />
      </appender>

<appender name="DB" class="org.apache.log4j.jdbcplus.JDBCAppender">
       <param name="url" value="jdbc:mysql://localhost:3306/peppol"/>
       <param name="dbclass" value="com.mysql.jdbc.Driver"/>
       <param name="username" value="root"/>
       <param name="password" value="mysql"/>
       <param name="buffer" value="1" />
       <param name="commit" value="true" />
       <param name="sql" value="insert into peppol.logs values('@INC@',
                                 cast ('@LAYOUT:3@' as date),'@CAT@','@PRIO@','@MSG@')"/>
       <layout class="org.apache.log4j.PatternLayout">
       <param name="ConversionPattern" value="%d - %c -%-4r [%t] %-5p %c %x - %m%n "/>
       </layout>
    </appender>

<appender name="FLE" class="org.apache.log4j.RollingFileAppender">
    <param name="file" value="/home/marcelo/singlelogfile.log"/>
    <param name="DatePattern" value="'.'yyyy-MM-dd"/>
    <param name="MaxFileSize" value="80kb" />
    <layout class="org.apache.log4j.PatternLayout">
        <param name="ConversionPattern"
               value="%d{yyyy-MMM-dd HH:mm:ss,SSS} [%t] %c %x%n  %-5p %m%n"/>
    </layout>
  </appender>

<logger name="com.alfa1lab.logger">
        <appender-ref ref = "CSL" />
        <appender-ref ref = "DB" />
        <appender-ref ref = "XML" />
        <appender-ref ref = "FLE" />
  </logger>

</log4j:configuration>