Some additional info: I can see both fmserverd and fmserver_helperd in the Activity Monitor, so it's not like those processes aren't running.
When I access FMS via the Admin Console from a different Mac, it displays the same behavior.
When I attempt to start FMS from the Terminal, there's no error in Terminal. But it doesn't affect the Admin Console in any discernible way.
Try clearing the Java cache from Utilities / Java Preferences
Thanks, Peter. I should have mentioned that that was one of the first things I tried to do. But it didn't help.
Have you been able to resolve this? I'm having the same problem.