Resolution:
Symptom: Instead of loading, Virtual Router produces the following type of error:

05/08/08 16:00:07.666 Info: [ProcessWrapper] 16:00:07,666 INFO [STDOUT] java.lang.NoClassDefFoundError: org/jboss/cache/PropertyConfigurator
05/08/08 16:00:07.666 Info: [ProcessWrapper] at java.lang.Class.forName0(Native Method)
05/08/08 16:00:07.666 Info: [ProcessWrapper] at java.lang.Class.forName(Class.java:164)
05/08/08 16:00:07.682 Info: [ProcessWrapper] at com.datasynapse.fabric.virtualrouter.VirtualRouterServlet$1.run(VirtualRouterServlet.java:111)
05/08/08 16:00:07.682 Info: [ProcessWrapper] at com.livecluster.util.threadpool.ReusableThreadPool$InternalThread.run(ReusableThreadPool.java:335)

To fix the problem do the following:

For JBoss 4.0.2: copy server/all/lib/jboss-cache.jar to the default configuration. JBoss 4.0.2 does not include JBoss Cache in it's default configuration.

Note: For externally managed JBoss, you must run JBoss using the all configuration. Consult your JBoss documentation for instructions.