What does "domain was null" message mean in the following exception???

[Alex Paransky]

java.lang.NullPointerException: domain was null
        at com.evermind.server.rmi.RMIServer.fw(JAX)
        at com.evermind.server.rmi.RMIServer.e7(JAX)
        at
com.evermind.server.rmi.RMIInitialContextFactory.getInitialContext(JAX)
        at
com.evermind.server.ApplicationClientInitialContextFactory.getInitialContext
(JAX)
        at
javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:668)
        at
javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:246)
        at javax.naming.InitialContext.init(InitialContext.java:222)
        at javax.naming.InitialContext.<init>(InitialContext.java:198)

This only happends when I connect from SERVER to SERVER, it does not occur
and works properly when I try CLIENT to SERVER.

Thanks.
-AP_