DNS resolves to nothing

I just installed the CWP on my new VPS CentOS 6.7 final, surely thank you very much for the 100% free CWP Panel.

the installation goes perfect without any error, and I am able to access and logging to my CWP panel using my root as user.

then its time to change the name server and assign the IP address..
so I edited it from DNS Functions => Edit Nameservers IPs (I have only 1 IP address.)
after editing I clicked on the Save changes button, but its seems to be not working for me.

ns1.muhammadtheking.in resolves to
ns2.muhammadtheking.in resolves to

this is what is shows me when I navigate to DNS Functions => Edit Nameservers IPs
that is resolves to nothing no IP address is shown after ns1.muhammadtheking.in resolves to

I am new to CWP but I love to use it, Please any one help what else I need to do.

Thanks in Advance.

Thanks to every one...

actually I need to set the child name server on the domain registrar.

and its working perfectly now...

resolving things now... very Happy now