Somehow the classpath is incorrect in your installation so the wrong Logger is being used. My local tomcat & resin installation is working fine. This is what I did:
. Download tomcat 5.5.9 / resin-3.0.14
. Ran ant clean jar plugins war
. Added -DmessengerHome=C:\jive-repo\messenger\target\war\messengerHome to the Java Options section in the Tomcat Monitor
. Copied messenger.war to webapps folder
. Started up Tomcat from Tomcat Monitor
Could you try those steps and let me know if the problem persists?