Gavin, Thanks for pointing me in the right direction (I would have never figured this out otherwise).. For anyone else out there with the same problem.. I solved it by changing local-tx-datasource to xa-datasource in DataSource-dev.xml example: | <xa-datasource> | <jndi-name>MainDatasource</jndi-name> | <xa-datasource-class>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</xa-datasource-class> | <xa-datasource-property name="URL">jdbc:mysql://xxx.xxx.xx</xa-datasource-property> | | <user-name>xxxxxxxx</user-name> | <password>xxxxxxxx</password> | <transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation> | | <!-- This disables transaction interleaving (which BTW, most DB vendors don't support) --> | <track-connection-by-tx/> | <isSameRM-override-value>false</isSameRM-override-value> | | <!--pooling parameters--> | <min-pool-size>5</min-pool-size> | <max-pool-size>20</max-pool-size> | <blocking-timeout-millis>5000</blocking-timeout-millis> | <idle-timeout-minutes>15</idle-timeout-minutes> | | <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name> | <metadata> | <type-mapping>mySQL</type-mapping> | </metadata> | </xa-datasource> | | -Dustin View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4059324#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...