I'm using WHM/CPANEL and have added a * wild card entry in the subdomains portion of the cpanel and it points to the root directory. I've added in the appropriate entries into .htacess but I still get a server not found error message. Using Firefox I get:
Firefox can't find the server at mysub.mydomain.com
I also notice that after adding the new site in the network control panel, it doesn't appear in the dropdown menu. It can only be accessed by viewing all sites.
I tried to use the WordPress MU Domain Mapping plugin to see if it would work but it does not either. I have that domain mapping plugin working on another site on the same serve but I have to add those subdomains in manually into CPANEL's subdomain manager. I'm hoping someone can help since I am sure I performed all the steps although obviously something is missing.