the postgresql datasource doesn't have the setURL method. you have to put the host, port, and db name in the mbean. <xa-datasource-property name="ServerName">hostname</xa-datasource-property> <xa-datasource-property name="PortNumber">5432</xa-datasource-property> <xa-datasource-property name="DatabaseName">dbname</xa-datasource-property> chip View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4134607#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...