Hi All I have looked all over the Internet on how to get logback to work under Jboss. I have added the 3 jar files slf4j-api-1.5.0.jar, logback-core-0.9.9.jar and logback-classic-0.9.9.jar to my project. I can confirm that after deployment the files are in my projects WEB-INF\lib directory. I have created a logback.xml file and after deployment the file is in my projects WEB-INF\classes directory. I start up jboss and my application works perfectly except logback. No matter what I do, It just wont initialize. I have no logging to the console or log files what so ever. My logback.xml file: <?xml version="1.0" encoding="UTF-8"?> <configuration> <appender class="ch.qos.logback.core.rolling.RollingFileAppender" name="RootFileAppender"> <append>true</append> <filter class="ch.qos.logback.classic.filter.ThresholdFilter"> <level>debug</level> </filter> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <fileNamePattern>mylogfile.nl.%d{yyyy-MM-dd}.gz</fileNamePattern> </rollingPolicy> <layout class="ch.qos.logback.classic.html.HTMLLayout"> <pattern>%d{yyyy-MM-dd HH:mm:ss}%p%t%ex%F%L%C{1}%M %m</pattern> </layout> </appender> <appender class="ch.qos.logback.core.ConsoleAppender" name="RootConsoleAppender"> <filter class="ch.qos.logback.classic.filter.ThresholdFilter"> <level>debug</level> </filter> <layout class="ch.qos.logback.classic.PatternLayout"> <pattern>%d{yyyy-MM-dd HH:mm:ss},%p,%c,%t,%ex,%F,%L,%C{1},%M %m%n</pattern> </layout> </appender> <root> <level value="debug"/> <appender-ref ref="RootFileAppender"/> <appender-ref ref="RootConsoleAppender"/> </root> </configuration> Thanks in advance, Martyn