Trying to migrate an app from 4.0.5 to 4.2.3 and is stuck with a Naming problem. What to do?

17:27:57,376 INFO  [Server] Starting JBoss (MX MicroKernel)...

17:27:57,376 INFO  [Server] Release ID: JBoss [Trinity] 4.2.3.GA (build: SVNTag=JBoss_4_2_3_GA date=200807181417)

17:27:57,376 INFO  [Server] Home Dir: C:\Java\jboss-4.2.3.GA

17:27:57,376 INFO  [Server] Home URL: file:/C:/Java/jboss-4.2.3.GA/

17:27:57,376 INFO  [Server] Patch URL: null

17:27:57,376 INFO  [Server] Server Name: default

17:27:57,376 INFO  [Server] Server Home Dir: C:\Java\jboss-4.2.3.GA\server\default

17:27:57,376 INFO  [Server] Server Home URL: file:/C:/Java/jboss-4.2.3.GA/server/default/

17:27:57,376 INFO  [Server] Server Log Dir: C:\Java\jboss-4.2.3.GA\server\default\log

17:27:57,376 INFO  [Server] Server Temp Dir: C:\Java\jboss-4.2.3.GA\server\default\tmp

17:27:57,376 INFO  [Server] Root Deployment Filename: jboss-service.xml

17:27:57,532 INFO  [ServerInfo] Java version: 1.6.0_20,Sun Microsystems Inc.

17:27:57,532 INFO  [ServerInfo] Java VM: Java HotSpot(TM) Server VM 16.3-b01,Sun Microsystems Inc.

17:27:57,532 INFO  [ServerInfo] OS-System: Windows XP 5.1,x86

17:27:57,720 INFO  [Server] Core system initialized

17:27:58,657 INFO  [ServiceBindingManager] Initializing store

17:27:58,657 INFO  [ServiceBindingManager] Using StoreURL: file:/C:/Java/jboss-4.2.3.GA/server/port-bindings.xml

17:27:58,892 INFO  [Log4jService$URLWatchTimerTask] Configuring from URL: resource:jboss-log4j.xml

17:27:58,923 INFO  [WebService] Using RMI server codebase: http://127.0.0.1:8083/

17:27:58,954 WARN  [ServiceController] Problem starting service jboss:service=Naming

java.lang.NullPointerException

        at org.jnp.server.Main.getNamingInstance(Main.java:301)

        at org.jnp.server.Main.initJnpInvoker(Main.java:354)

        at org.jnp.server.Main.start(Main.java:316)

        at org.jboss.naming.NamingService.startService(NamingService.java:284)

        at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)

        at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)

        at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

        at java.lang.reflect.Method.invoke(Method.java:597)

        at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)

        at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)

        at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)

        at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)......

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