Hello,
You don’t need to change the DNS servers (ns1, ns2, and ns3) to MonsterASP.net unless you want to manage the domain entirely with us. In that case, you would need to add the domain studio-elf.net in the control panel under DNS > Add Domain and create the necessary records for it.
Please keep the DNS servers at their original value and only set up an A record for the test subdomain at your registrar, pointing to the IP 144.76.151.1. The record should look like this:
Name: @
Type: A
Value: 144.76.151.1
This way, the main domain studio-elf.net will remain functional, and test.studio-elf.net will work from our servers.
Best Regards
MonsterASP.NET team