Hi Ales, First of all, thank you for your reply. Well, putting jboss-classloading.xml inside my slf4j didn´t work (I laso removed jboss-classloading.xml from RAR because of classes visibility). Anyway, I don't believe it is a ellegant approach and now I suppose I'm tied to JBoss SLF4J implementation :-( Now, I'll try TCL filter. Please let me know if there is another approach that I can try, because I really prefer do not changing server files... Thanks again, Andre View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4266160#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...