I had my application running well on jboss, but after i installed JBoss IDE on Eclipse 3.1.1, my application is not starting properly. I'm getting following error org.jboss.deployment.DeploymentException: Trying to install an already registered mbean: Can anyone tell me whats the basic reason of this error. Thanks in anticipation, Santosh. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3982660#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...