Are you packaging any jar files containing javax.sql.* package? If yes, remove them from your application packaging. If that does not solve the issue, please post the output of the JNDI tree by following the steps mentioned here http://www.jboss.org/community/docs/DOC-9583 While posting logs or xml content or code, please remember to wrap it in a code block by using the Code button in the message editor window. Please use the Preview button to ensure that your post is correctly formatted. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4202381#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...