Java Programming

Following entry appears twice in my log:

log4j:WARN The content of element type "logger" must match "(level?,appender-ref)".*

This is my log4j.xml file:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration>
	<appender name="stdout2"
		class="org.apache.log4j.DailyRollingFileAppender">
		<param name="File"
			value="D:\\Instalados\\myMO\\logs\\mymo_stdout.log" />
		<param name="DatePattern" value="'.'yyyy-MM-dd" />
		<param name="Encoding" value="UTF-8" />
		<layout class="org.apache.log4j.TTCCLayout" />
	</appender>	
	<appender name="stdout"
		class="org.apache.log4j.DailyRollingFileAppender">
		<param name="File"
			value="D:\\Instalados\\myMO\\logs\\liferay_stdout.log" />
		<param name="DatePattern" value="'.'yyyy-MM-dd" />
		<param name="Encoding" value="UTF-8" />
		<layout class="org.apache.log4j.TTCCLayout" />
	</appender>
	<logger name="com.managedobjects.mocmdbweb.cicrud" additivity="false">
		<level value="INFO" />		
		<appender-ref ref="stdout2" />
		<priority value="info" />
	</logger>	
	<logger name="com.liferay.portal" additivity="false">
		<level value="INFO" />
		<appender-ref ref="stdout" />
		<priority value="info" />
	</logger>
	<root>
		<priority value="INFO" />
		<appender-ref ref="stdout2" />
	</root>
</log4j:configuration>

Could somebody tell my what I’m doing wrong?
Thanks.