Lame Name Servers
This tutorial will explain what lame name servers are, and how to fix them
A name server that is “lame” does not answer for your domain; or, in other words, no zone file for your domain has been configured on the queried name server.
Make sure you have configured your domain name in your name server to avoid a “lame” name server issue, e.g. this can be done in BIND by adding the relevant zone file.