I have been following the instructions in http://www.howtoforge.com/set-up-a-loadbalanced-ha-apache-cluster-ubuntu8.04 to set up a loadbalanced cluster. All the instructions in the article seem to work correctly up until the last step where you hit the virtual IP address in a browser. That returns an "Unable to connect" error. I am able to ping the virtual IP address from the computer I am trying to connect from, but I am unable to see any web pages. This is the first time I have attempted to set up a cluster, so this is something of a learning experience for me. Any help would be greatly appreciated. Thanks.