RMI Works In One Direction, But Not When Config Flipped

Hi All,
Interesting problem: I have an SSL-RMI server, running either as an application, or as a service using JS Wrapper, on PC-A, correctly serving content to a client running on PC-B.
But when I flip the configuration, such that PC-B is now hosting an SSL-RMI server, PC-A's client is consistently showing a "connection refused" error, and will not connect whenever I attempt to run it as a service on PC-B.
The strange thing is that I can run this server on PC-B as an application from the command-line or from within NetBeans, but again, as soon as I am running it as a service, using JS Wrapper, PC-A shows "connection refused".
I've opened firewalls per the instructions found here:
http://support.microsoft.com/kb/308127
but these are simply two locally connected PC's, so what's the problem?
PC-A: Windows XP Home Ed: 192.168.1.100
PC-B: Windows XP Pro Ed: 192.168.1.102
EJavaM07

Was able to get past it by running the jar that was to become the service from the command line. This caused the Windows firewall to prompt me asking whether it should allow future use of these ports by this application. I answered yes, and then reinstalled it as a service using Java Service Wrapper (which is excellent, btw), and all ran smoothly thereafter.
I guess when running as a service, the firewall breach attempt wasn't triggering a response from the Windows firewall, so nothing appeared to be working. I had already allowed this breach on my primary PC (months ago), so hadn't remembered that I needed to do that there.
Thank you for the help.

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