domain mapping cannot access subdomain dashboard after creation

I finally got multi site set up and going with my host and installed the domain mapping plugin. Moved sunrise.php and edited my wp-config.php.

However when I created.

subdomain.mydomain.com

I tried to access the dashboard for that site and nothing. The main site, I can do everything. The subdomain cannot be viewed or accessed.

I have tried removing suggested lines from wp-config.php as per the plugin suggestions but to no avail.