Hi,
it seems your app contains JAR files which are already part of JBoss (e.g. xml parsers).
I would suggest to remove:
-dom4j-1.6.1.jar
-hibernate-3.2.5.ga.jar (Hibernate should not be bundled with your own app)
-log4j-1.2.8.jar
-xml-apis-1.3.02.jar
If your app does not work without this stuff, you have to play with classloading. I don't have a link here, you have to search the web yourself.
Best regards
Wolfgang