For mysql datasources: Take a look at server/default/deploy/jbpm/jbpm-mysql-ds.xml. I think the installer doesn't substitute the connection properties. It should contain something like this: | [...] | <xa-datasource-class>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</xa-datasource-class> | <xa-datasource-property name="URL">jdbc:mysql://localhost:3306/jbpmtest</xa-datasource-property> | <user-name>jbpmtest</user-name> | <password></password> | [...] | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4203557#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...