Are you deploying your entire application using an EAR file? If not, you should try that. That could fix your problem.
So, you would have a SAR archive and a WAR archive and they would both be contained within your EAR archive. Of course you will also need some additional xml files (i.e. application.xml, jboss-app.xml).
Thanks Javier, I will try to create a EAR file and see if this solves my problem.