What you are trying to do is remotely view a desktop on your FC box, right? There are a lot of complicated ways to accomplish this. Fortunately there are also a couple of super easy ways.
1. Log into Gnome on the box and go to System=>Preferences=>Remote Desktop and simply enable desktop sharing.
2. Or, if you don't have X started or are logging in via ssh, log on to the console and execute "vncserver :x" where x is simply the screen you wish to run on (X runs on screen 0 at the console so choose 1,2,3,4,5,6,whatever for another session) and enter the password you want to use for authentication when connecting. You'll also probably want to vi ~/.vnc/.xstartup and change the last line to "gnome-session &" or whatever your favorite manager is so that you’ll get that desktop when you connect. Don't forget to restart the server! Try vncserver -kill :screen to end that session. Then restart it with the aforementioned vncserver :screen command.
3. Go to realvnc.com and download the free VNC Viewer program for your Windows (or whatever OS) PC. When you launch it you'll need to enter the hostname or IP address of the FC box with a :screen appended. For example: linuxRULES.somenet.com:27 then enter the password when prompted.
Congratulations! You should now be connected to your Linux desktop. Be aware that VNC is not secure so I would run it only on a private network. Remember also that there are a LOT of different ways to accomplish this in a more elegant fasion - but this should at least get you rolling. I'd also recommend spending some time in a shell learning the vast power of the command line (even in WINblows!)
Enjoy!