If your domain is registered through NetNerd, you can update your nameservers from within the client area as follows:
Login to the client area at https://my.netnerd.com/clientarea.php and click on Domains -> My Domains:
Click on the domain you want to update (on the line, not the domain name itself):
Then on the next page, click nameservers on the left menu as indicated by the red arrow, and you can then change the nameservers on the right hand side, click Change Nameservers when ready:
