Finally, i followed the tutorial Eclipse plug-in Installation for jBPM5
http://community.jboss.org/people/bpmn2user/blog/2011/02/27/eclipse-plug-in-installation-for-jbpm5 and it works very well but for jBPM 5 and Helios eclipse version.
So i would like to know if there is compatibility between Eclipse Ganymede v3.4 with jdk 1.6 which run with jBPM3 or 4.
Can i follow steps of the above tutorial with theses versions?
What is the most stable version of jBPM?
Thanks