Spent an hour with TB's manager's domain from nettigritty. Authoritative name servers for the domain were not configured properly. Logging in to http://domain.nettigritty.com/customer
In the Management console, clicking Domain Registration, Clicking on Modify Name Server in the second row, changed the name servers from ns11.nettigritty.com etc to
This did the trick. Dns changes took approx 10-15 minutes, then it started working.