register a name server

Does anyone know how to add a DNS to register name server at Go Daddy or any where else. My NS1 and NS2 are working, but the NS3 is getting an error->

''NS3.mydomain.COM is not a registered name server.''

Any help on how to register this is great!

[Brangwyn]

Ok, took me a while to find it as well, I do not like their new web control panel .. a good reason to finish transfering all my domains to enom

Anyway, from the domain manager, click on the domain you wish to register the nameservers under.

Then on the right hand panel that shows you the domain info, expand the "Domain Hosts Summary" box.

It should then show you your existing registered nameservers and let you add new ones.

Hope that helps.