Description of problem:
File appclient/configuration/appclient.xml has an incorrect order of elements. <core-environment> tag should be before <recovery-environment /> tag. These tags is in <subsystem xmlns="urn:jboss:domain:transactions:1.4"> and schema is in docs/schema/jboss-as-txn_1_4.xsd. This schema defines specific order of elements.

Version-Release number of selected component (if applicable):
6.4.0.ER2

Validate logs:
appclient/configuration/appclient.xml:150: element recovery-environment: Schemas validity error : Element '{urn:jboss:domain:transactions:1.4}recovery-environment': This element is not expected. Expected is ( {urn:jboss:domain:transactions:1.4}core-environment ).