1. this might help: http://www.jboss.org/community/docs/DOC-10781
2. do you perform exploded deployment or do you deploy a EAR/WAR file?
Exploded deployment may result in problems, if the server hot deploys a half published app. So, EAR or WAR deployment is the better approach.
But what are the detailed error messages?
Hope this helps
I will try your suggestions and will get back.