Domain does not work with "www"
You need to check your DNS zone settings to see if you have an "A" record for "www" entry of your domain. It should look like: www IN A xxx.xxx.xxx.xxx (where xxx is your domain IP address, which can be obtained from control panel) Or you may also setup CNAME record: www IN CNAME yourdomain.com. Anyway it is recommended to fully point your domain to our name servers. This will guarantee that all services will work perfectly.