Failed to rename log file

Hi,

I am using Log4Cxx on Windows. I always get the following error 

------------------------------------------------------------------------
-----------------------------------
Failed to rename [C:\app-name/logs/event-handler.log] to
[C:\app-name/logs/event-handler.log.2005-11-28].
------------------------------------------------------------------------
-----------------------------------

Due to this error, in order to continue writing log, Log4Cxx overwrites
the old log file. Thus I lose the old log.

I am using DailyRollingFileAppender and my config file is as given below

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "./log4j.dtd">

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/";
debug="false">
        <appender name="APP_LOGFILE"
class="org.apache.log4j.DailyRollingFileAppender">
                <errorHandler
class="org.apache.log4j.helpers.OnlyOnceErrorHandler"/>
                <param name="File"
value="${APP_HOME}/logs/event-handler.log"/>
                <param name="Append" value="true"/>
                <param name="Threshold" value="warn"/>

                <!-- Rollover at midnight each day -->
                <!--<param name="DatePattern" value="yyyy-MM-dd"/> Does
not work-->

                <param name="MaxFileSize" value="25MB" />
                <param name="MaxBackupIndex" value="10" />
                <layout class="org.apache.log4j.PatternLayout">
                        <param name="ConversionPattern" value="%d %-5p
[%c{1}] %m%n"/>
                </layout>
        </appender>

        <root>
                <appender-ref ref="APP_LOGFILE"/>
        </root>
</log4j:configuration>

Regards,
Jitendra