CName: Host: www, Points To: mydomain.reg.[Organization Id].live.siteforce.com, TTL: 2000 SECONDS

Txt : Host: @ , Points To: Salesforce Organization Id, TTL: 2000 SECONDS

After CName and Txt configuration, i have created www.mydomain.reg custom domain in salesforce and added this custom domain to force.com site (mysite) via custom URL. However, when i run "www.mydomain.reg" url on browser i am getting the exception.