named assertion

[ghiggia]

I'm trying to set up a test name server and I configured bind with webmin.
I've configured only a master zone with 1 host (A record)
Named crashes on startup with the following messages:

May  2 09:00:36 selen named[4709]: zone version.bind/CH: has 0 SOA records
May  2 09:00:36 selen named[4709]: zone version.bind/CH: has no NS records
May  2 09:00:36 selen named[4709]: view.c:347: REQUIRE((&view->references)->refs
> 0) failed
May  2 09:00:36 selen named[4709]: exiting (due to assertion failure)

The configuration file are as follow:

/etc/named.conf

// Default named.conf generated by install of bind-9.2.4-8_FC3
options {
        directory "/var/named";
        dump-file "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
};
include "/etc/rndc.key";

zone "xxs.com" {
        type master;
        file "/var/named/xxs.com.hosts";
        };

/var/named/xxs.com.hosts

$ttl 38400
xxs.com.        IN      SOA     selen. admin.xxs.com. (
                        1114772072
                        10800
                        3600
                        604800
                        38400 )
xxs.com.        IN      NS      selen.
host.xxs.com.   IN      A       10.1.1.1

What's wrong?
Thanks.