Martin... Can i say somthing first.... u r simply great..... yes i found the problem.... it was the wrong file in jbpm.sar.cfg.jar I have changed hibernate.cfg.xml in jbpm.sar.cfg.jar and deplyed it again Then the problem disappears... Fist of alll thank you martin... But one more problem.... I just need to put the above jar files that i mentioned in to CATALINA_HOME/common/lib Otherwise it will not work... So now i put these all jar files in to my projects classpath and also in CATALINA_HOME/common/lib 1. Is there any solution for this?? 2. Can i deploy my jbpm project in to Tomcat 4.1 3. Can i Stop the execution of the thread which is running the background(for timer) Thanks Jobu View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4122459#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...