Centos – Apache won’t start after installing mod_ssl on CentOS

I need to run both http and https on the same hostnames on my server. I had everything running without SSL with hosts configured in the /etc/httpd/conf.d directory.

    System: CentOS release 5.6 (Final)
    Server: Apache/2.2.3

I was following the instructions here:
http://shapeshed.com/journal/setting_up_mod_ssl_on_apache_centos_52/

But now:

    sudo /etc/init.d/httpd restart

Responds with:

    Starting httpd: (98)Address already in use: make_sock: could not bind to address [::]:443
    (98)Address already in use: make_sock: could not bind to address 0.0.0.0:443
    no listening sockets available, shutting down
    Unable to open logs
                                                       [FAILED]

At the bottom of /etc/httpd/conf/httpd.conf I have:

    NameVirtualHost *:80

I tried adding NameVirtualHost *:443 below that but it didn't help.

One more thing: Webmin was previously installed and that is already running at http://XXX.XXX.XXX.XXX:10000

Could that be a factor?

Any help would be greatly appreciated; as you can probably tell I'm flying by Google here I've not done this before.

Thanks!