Does you application contain a jar that provides this class?
It's a non-standard class that happens to be provided on WebLogic and WebSphere platforms that was useful before Work Management was added to JCA (part of JavaEE platform).
we dont have this jar in our application.!!!
Earlier in jboss5 we use to add "jbosscommonj.sar" in deploy folder to overcome this issue, but in jboss7.1.1 final it is not working.
I think the short answer is that it may no longer be supported. You may be able to accomplish something similar with EJB timers now.