You need to put a password in your password file. Look at the vncpasswd command in order to do this. Make sure you do this as "root" so that it writes it to the correct file.
After that, you should only need to restart the X server. You need to make sure that it shuts down entirely, then restart it. "telinit 3" should be useful if you're running at init level 5. Then make sure with "killall X" as root after you login to one of your consoles. Then "telinit 5" should restart X for you....
Well, I ended up rebooting the machine and didn't need to restart the X server. I can log into the machine via ssh with X11 forwarding and then issue
vncviewer localhost:1
and it asks for the password and starts to export the desktop, but it fails. I see the Fedora splash screen and then there is a window displaying an error message about some Gnome manager that isn't working. The screen turns black and I can't do anything. If I log out of ssh and then back in and do vncviewer... then I just get a black screen after entering my password. Is there something else I need to do?
Thanks again, Jeremy