Your -ds.xml looks fine. I reason i asked you to post that was, i thought you had used the DefaultDS as the datasource name. jboss.jdbc:datasource=DefaultDS,service=metadata -> ** NOT FOUND ** This datasource is configured through the hssql-ds.xml file present in %JBOSS_HOME%/server/< serverName>/deploy folder. Did you remove that file or change it? Also please post your entire console logs from the point you start the server till you see this exceptions. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4185957#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...