"PeterJ" wrote : Try this: change two lines in the *-ds.xml file that you copied: | | 1) Give it a different jndi-name value | 2) Give it a different database name value (change 'localDB' in connection-url to something else) | | You will probably have to change your code to reference the new jndi-name. | Hi Mr Peter, Thank you very much every thing is allright now,and ihave no errors!!! View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4269491#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...