The EJB 2.1 deployment descriptor for the CommandServiceBean contains a spelling error in the resource-ref element:

<res-type>javax.jms.ConnnectionFactory</res-type>

this should be(only 2 'n's):

<res-type>javax.jms.ConnectionFactory</res-type>

http://anonsvn.jboss.org/repos/jbpm/jbpm3/trunk/modules/enterprise/src/main/resources/META-INF/ejb-jar.xml

This causes some interesting issues on Weblogic since the resource-ref element describes if the ConnectionFactory returned from JNDI is pooled and auto enlisted in XA(http://e-docs.bea.com/wls/docs103/jms/j2ee.html). This is described correctly in the web.xml file, so async steps in a process with, jms configured only works if JBPM first was initialized via the web context(That way JmsMessageServiceFactoryImpl holds a ref to the 'correct' ConnectionFactory).