Hi Sukla,
I am sorry, I am not familiar with jBPM-3.x. If you want to use jBPM-4.3, there is the User guide you could followed.
http://docs.jboss.com/jbpm/v4/userguide/html_single/
Or maybe you could ask in the user forum, this is the developer forum, so here is few people talking about how to use jBPM.
cheers.