In order to use our DNS servers with your domain, you have to configure the NS records on you present provider/maintainer.
To do so, you just need to ask them to proceed with this configuration.
Here's a template for the e-mail to send them after you've modified the domain name:
we need to configure the NS records for our domain domainname.ext
primary DNS server: dns1.nettica.com
secondary DNS server: dns2.nettica.com
In case of truble you can contact our web agency at: email@example.com