anonymous wrote : oracleDS = (javax.sql.DataSource) initialContext.lookup("jdbc/OracleDS"); This should be oracleDS = (javax.sql.DataSource) initialContext.lookup("java:comp/env/jdbc/OracleDS"); Also, anonymous wrote : | <resource-ref> | <res-ref-name>jdbc/OracleDS</res-ref-name> | <res-type>javax.sql.DataSource</res-type> | <jndi-name>jdbc/OracleDS</jndi-name> | </resource-ref> The jndi-name here doesnt look right to me. Most of the times it is java:/OracleDS. So try using the following: <resource-ref> | <res-ref-name>jdbc/OracleDS</res-ref-name> | <res-type>javax.sql.DataSource</res-type> | <jndi-name>java:/OracleDS</jndi-name> | </resource-ref> | If that doesnt work, post the error message that you are seeing and also the *-ds.xml file which you are using for configuring the datasource View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4043245#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...