If your domain is registered with Register.com, please follow this tutorial to guide you through the DNS changes required to activate your account.
Part I - DNS Modification
Visit http://www.register.com and click 'My Account' to Sign In to Domain Manager. Enter your Register.com User Name and Password.
On the Domain Manager page, click 'Modify DNS'.
Check off the two boxes to delete the current Domain Name Servers. Then enter your enter ns1.abchk.net as primary nameserver and ns2.abchk.net as secondary nameserver , select the email address you wish to use to confirm to the change and click 'Submit'.
On the Confirm your DNS Changes screen, click 'Confirm' to confirm to submit the changes..
FInal , and email will send to you double confrm the dns change.
For security purposes, an email will be sent to your domain administrative email contact from Register.com to request you to validate the changes. To validate the changes, click on the link provided in the email from Register.com. A new page will be opened in your web browser and you will need to click the ' Make this Change' button to finalize your DNS changes.
After confirm email and Waiting ~48hrs for dns update : COMPLETED !