What causes 'Can't find server name for address' error?

[lynton]

I got a server and am trying to setup BIND (8.2.3) but get the
following error when doing nslookup. I read thru the mailing list
archives and found something may be wrong with the reverse lookup
file, but I can't see anything wrong with it (or the other files). The
files are given below.
Please help if possible.

*** Can't find server name for address 111.222.333.444: No information
*** Default servers are not available

I made these files for mydomain.com and IP 111.222.333.444 (actual
domain name and IP substituted later)
db.cache is the root cache data available at
ftp://ftp.rs.internic.net/ but not displayed down here

named.conf__________________________________________________________________

options {
        directory "/etc/namedb";
        pid-file "/var/run/named.pid";
        };

zone "." {
        type hint;
        file "/etc/namedb/db.cache";
        };

zone "mydomain.com" {
        type master;
        file "/etc/namedb/mydomain.com.hosts";
        };

zone "444.333.222.111.in-addr.arpa" {
        type master;
        file "/etc/namedb/111.222.333.444.rev";
        };


    zone "0.0.127.IN-ADDR.ARPA" {
            type master;
            file "localhost.rev";
    };



mydomain.com.hosts__________________________________________________________________

$ttl 38400
mydomain.com.      IN      SOA     mydomain.com. dns.mydomain.com. (
                        988864461
                        10800
                        3600
                        432000
                        38400 )
mydomain.com.      IN      NS      mydomain.com.




111.222.333.444.rev__________________________________________________________________

$ttl 38400
444.333.222.111.in-addr.arpa.     IN      SOA     mydomain.com.
dns.mydomain.com. (
                        988864515
                        10800
                        3600
                        432000
                        38400 )
444.333.222.111.in-addr.arpa.     IN      NS      mydomain.com.




localhost.rev__________________________________________________________________

$TTL    3600

@       IN      SOA     mydomain.com. root.mydomain.com.  (
                                20010123        ; Serial
                                3600    ; Refresh
                                900     ; Retry
                                3600000 ; Expire
                                3600 )  ; Minimum
        IN      NS      mydomain.com.
1       IN      PTR     localhost.