gtk or Xhost problem with linuxconf

["Richard M. Pavonarius" <richard global-commons co jp>]

I'm a somewhat newbie running RedHat 6.1, gnome desktop. I upgraded from 
linuxconf-1.16r3.2-2 to 1.17r8-1 today.

I'm logged in as root, not a user, at the console, not remotely. The first 
or second time I try to run linuxconf I always get "Broken pipe"

After that I always get:
Error message from remadmin :
Error message from remadmin :Gdk-WARNING **: locale not supported by C library
Error message from remadmin :Xlib: connection to ":0.0" refused by server
Error message from remadmin :Xlib: Invalid MIT-MAGIC-COOKIE-1 key
Error message from remadmin :
Error message from remadmin :Gtk WARNING **: cannot open display: :0

So I set my locale to en_US with locale_config. Still get the "locale not 
supported" error.

Someone told me to try this:
xhost localhost

...and it allows me to run linuxconf. All other X apps work. Gimp works, 
when linuxconf won't.

If I type xhost as root I get "access control enabled, only authorized 
clients can connect".

If I type it in via telnet as a user I get xhost:  unable to open display ""

What the heck is going on?

Thanks,

Rich
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Richard M. Pavonarius, Global Commons, Inc., Tokyo