Apache does not start error on Ubuntu 8.04LTS 64bit

I created a virtual server and tried to start Apache and get the following error message:

* Starting web server apache2
[Wed Oct 15 18:38:59 2008] [warn] NameVirtualHost *:0 has no VirtualHosts
...fail!

Apache was working before I installed VirtualminPro - after installing VirtualminPro, however I can't run Apache.

Status: 
Closed (fixed)