When I call MessageStoreFactory.getInstance() using the default configuration, an exception is thrown indicating the impl class is not found. I looked in the config and noticed the impl class referenced by org.jboss.soa.esb.persistence.connection.factory is not valid. It should be org.jboss.internal.soa.esb.persistence.format.MessageStoreFactoryImpl. After updating that, it gets further but crashes with a missing dependency on c3p0-0.9.1-pre9.jar. Copying that into jbossesb.sar/lib fixes the problem and everything seems to work fine. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4030852#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...