i have forgot to tell that my war is build with eclipse module dependencies , so it has myfaces-1.1-impl.jar , myfaces-1.1-api.jar , and jboss-seam.jar. That's all , it manage to find the instance of jbpm launched with jbpm.sar (jbpm administration webapp works well). The jbpm.sar use jbpm.jar that i have build from the source of 3.1.2 not the one which is bundled with seam1.0.1GA. Sorry for poor english language. Regards, Jean View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3962490#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...