제 도메인 이름 풀이를 하지 못해요!

현재 리눅스를 셋팅하고 있습니다.
그런되...
nslookup ns.***.net 하면 이름 풀이를 잘 하는되...

nslookup ***.net 하면 이름 풀이를 하지 못합니다!

어떤 이유 때문인지.. 고수님들에 자문을 부탁드립니다!

지금 예를 들어 네 컴퓨터 셋팅을 보여들리겠습니다! (이걸 꼭 보세요! 그럼)

ex)
   호스트네임:root
   도메인: yahoo.com       
   IP주소: 222.111.111.116 
          * 위 아이피는 예제입니다.. 실제로 고정IP를 사용하고 있습니다!

--- /etc/hosts-----------------------------------------------
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1               localhost.localdomain localhost
222.111.111.116          root           root

--- /etc/resolv.conf -----------------------------------------
nameserver 168.126.63.1

---- /etc/named.conf------------------------------------------

include "/etc/rndc.key";

controls {
        inet 127.0.0.1 port 953
        allow { localhost; } keys { rndckey; };
};

options {
        directory "/var/named";
};

//
// a caching only nameserver config
//

zone "." IN {
        type hint;
        file "named.ca";
};

zone "localhost" IN {
        type master;
        file "localhost.zone";
        allow-update { none; };
};

zone "111.111.222.in-addr.arpa" IN {
        type master;
        file "222.111.111.116.rev";
        allow-update { none; };
};

zone "0.0.127.in-addr.arpa" IN {
        type master;
        file "named.local";
        allow-update { none; };
};

zone "yahoo.com " IN {
      type master;
      file "yahoo.com.zone";
      allow-update { none; };
};

--- /var/named/yahoo.com.zone------------------------------------------------

$TTL    86400
@                       IN SOA  ns.yahoo.com. root.ns.yahoo.com. (
                                        42              ; serial (d. adams)
                                        3H              ; refresh
                                        15M             ; retry
                                        1W              ; expiry
                                         )              ; minimum

        IN NS           ns.yahoo.com.

        IN A            222.111.111.116
www     IN A            222.111.111.116
ns      IN A            222.111.111.116
-----------------------------------------------------------------------------