'Website matches all sub-domains' not working

I am trying to get WordPress multisite working with subdomains. I have ‘Website matches all sub-domains’ set to Yes for the main domain but when I type the subdomain it just toes to the default site I setup in Webmin not the domain I am setting up…

WordPress has no control over the web server. It’s just agreeing to answer for any subdomain. You need to configure the webserver to answer on all of the names you want it to answer on. Easiest way is to add an Alias in Virtualmin for each of the names you want WordPress to work on.

Thanks, I did it by setting up Vietual Server ‘aliases’ under the main domain. I then changed the domain in wordpress and did not even need to use the MU Domain plugin I was using.