Hi I have placed hibernate3.jar in only lib folde of the server and not in the application. I did't not change any thing i JBoss after installation. I have created the EAR from eclipse and it will create a folder with .ear in my case the folder name is CONSEAR.ear. And it contain a JAR file and a WAR file. In the classes folder of WAR i placed the spring and hibernate confiugration file. But there are other jar that are also part of application are placed in the deploy directory. To my surprise the application works good in local environment , it give me the error only when i get deploy in the remote server, I copy and paste the entire serer instance of JBoss in the remote server. Regards Siddiq. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4180106#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...