Actually, it's still a problem of jar version between those shipped by Seam and by Jboss. Jboss comes with an old version of LocalManagedConnectionFactory in its jboss-common-jdbc-wrapper.jar (C:\Program Files\jboss-4.0.4.GA\server\default\lib). You can delete it and use instead the jboss-ejb3-all.jar shipped by Seam to resolve the problem. (You can't resolve the problem by simply copying the new jar into the directory since the jboss-common-jdbc-wrapper.jar is before jboss-ejb3-all.jar in the classpath) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3958479#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...