log4j

i am using log4j in linux platform.
i hav placed log4j.jar in the classpath.

while restarting tomcat i got this error.

log4j:WARN No appenders could be found for logger (de.jangroth.MobileMusicSync.TriviaTest).log4j:WARN Please initialize the log4j system properly.

my configuration file in WEB-INF/classes is:

log4j.rootCategory=INFO, dest
#specify the destination file
log4j.appender.dest=org.apache.log4j.RollingFileAppender
log4j.appender.dest.File=C:/logmessages
# Control the maximum log file size
log4j.appender.dest.MaxFileSize=1MB
# Archive log files (one backup file here)
log4j.appender.dest.MaxBackupIndex=1

#--set layout
log4j.appender.dest.layout=org.apache.log4j.PatternLayout
log4j.appender.dest.layout.ConversionPattern=%-5p [ %d : Caller - %C : Method - %M ] : %m%n

help me to solve this issue.