Kavin,
I've seen this error before:
java:global/jbpm-gwt-console-server/EjbSynchronizations!org.jboss.seam.transaction.LocalEjbSynchronizations
java:app/jbpm-gwt-console-server/EjbSynchronizations!org.jboss.seam.transaction.LocalEjbSynchronizations
java:module/EjbSynchronizations!org.jboss.seam.transaction.LocalEjbSynchronizations
java:global/jbpm-gwt-console-server/EjbSynchronizations
java:app/jbpm-gwt-console-server/EjbSynchronizations
java:module/EjbSynchronizations
It has to do with incompatibilities -- but can be gotten rid of by uncommenting some lines in your standalone.xml.
I believe the line even references "ejbsynchronizations", although unfortunately I can't remember exactly what it was.