Configure VNC to access Ubuntu GUI - connection refused

Hi
not sure if this is the right place for this. BTW...I am a noob.

I installed Xen Server 6.2 on a home PC. As a VM, I then installed Ubuntu 12.04 server 64bit. I can access this from a Win XP machine using the XenCentre Client.

However, the terminal and I "aren't close friends" and I'd like to be able to access the Ubuntu installation via a GUI.

Here's what I did from the terminal:

• Installed x11vnc
• created a script in /etc/init/x11vnc.confscript
• x11vnc -xkb -noxrecord -noxfixes -noxdamage -display :0 -auth /var/run/lightdm/root/:0 -forever -bg -o /var/log/x11vnc.log
  
  end script
  
  
• installed lightdm
• changed permission on that file sudo chmod 660 /etc/x11vnc/x11vnc.pass
• enabled ufw
• enabled default ports for VNC
  sudo ufw allow 5800/tcp
  sudo ufw allow 5900/tcp
  sudo ufw allow 6000/tcp

When I try to use VNC viewer to 192.168.1.103:0 it gives an error - Connection refused (10061).

There is a lot on the web about this problem - I've trawled through a lot of it, without resolving the issue (I know it will be operator). I've hung around the IRC channels to get assistance without luck.

I'd appreciate any advice you may be able to give.

Paul