Since Apache is installed it is starting up and listening on port 80.
You'll need to stop apache first.
You can do this by
sudo /etc/init.d/apache2 stop sudo update-rc.d apache2 remove
This will remove apache2 from the startup scripts.
After you stop apache2 you need to restart aolserver process.
sudo /etc/init.d/aolserver4 restart
The web site now indicates "Unable to connect"
I seem to have 2 aolserver4 services running: aolserver4-nsd───3*[{aolserver4-nsd}] aolserver4-nsd───8*[{aolserver4-nsd}]