Do you really need the jbossws-cxf.xml ?
I am not sure which JBoss AS you are using. If it is JBoss AS 5, then including this file is not a mandate unless you need some more fuctionality apart from knowing the details regarding the deployment endpoint.
When you do not include this, in your /tmp folder, the jbossws-cxf.xml file gets automatically generated with the required configuration.