Dns error no address

I’ve just installed Bind9 and Webmin on my VPS to manage a DNS server. Domain of the nameserver is ns1.primesystems.ch.

I created a new master zone (forward) for smartvend.ch through webmin. This works just fine, ip is resolved correctly. See configuration.

$ttl 38400
smartvend.ch.   IN  SOA ns1.primesystems.ch. john.doe.domain.ch. (
        1399011114
        10800
        3600
        604800
        38400 )
smartvend.ch.   IN  NS  ns1.primesystems.ch.
smartvend.ch.   IN  A   185.16.173.71

But when I create a new master zone for primesystems.ch (TLD of nameserver, maybe problem?) through webmin, an error occurs.

Config:

$ttl 38400
primesystems.ch.    IN  SOA ns1.primesystems.ch. john.doe.domain.ch. (
        1399028931
        10800
        3600
        604800
        38400 )
primesystems.ch.    IN  NS  ns1.primesystems.ch.
primesystems.ch.    IN  A   185.16.173.71

Error message:

The following errors were found in the records file /var/lib/bind/primesystems.ch.hosts ..

zone primesystems.ch/IN: NS 'ns1.primesystems.ch' has no address records (A or AAAA)
zone primesystems.ch/IN: not loaded due to errors.

The /etc/bin/named.conf.local looks like this:

zone "smartvend.ch" {
    type master;
    file "/var/lib/bind/smartvend.ch.hosts";
    };
zone "primesystems.ch" {
    type master;
    file "/var/lib/bind/primesystems.ch.hosts";
    };

So primesystems.ch can not be resolved by dig or host command — but smartvend.ch can.

So in my point of view, there must be a problem with primesystems.ch because it’s also the nameserver. What i want is to route the url primesystems.ch to a webserver. Has anyone a idea?

UPDATE:
After adding ‘ns1 IN A 185.16.173.70’, the error disappeared. But when I run ‘host primesystems.ch’ no IP is returned. And ‘dig primesystems.ch’ returs this:

; <<>> DiG 9.8.3-P1 <<>> primesystems.ch
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 33401
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;primesystems.ch.       IN  A

;; AUTHORITY SECTION:
primesystems.ch.    424 IN  SOA ns1.primesystems.ch.         kevin.kirn.kdsolutions.ch. 1399027394 10800 3600 604800 38400

;; Query time: 23 msec
;; SERVER: 62.2.17.61#53(62.2.17.61)
;; WHEN: Fri May  2 13:43:49 2014
;; MSG SIZE  rcvd: 96

I am configuring my private DNS server.
I am following this tutorial. But when I reached the Check BIND Configuration Syntax step, I got some errors.

Here is the command output:

x@e-dns1:/etc/bind$ sudo named-checkzone xyz1.com forward.xyz1.com
zone xyz1.com/IN: NS 'dns1.xyz1.com.xyz1.com' has no address records (A or AAAA)
zone xyz1.com/IN: NS 'dns2.xyz1.com.xyz1.com' has no address records (A or AAAA)
zone xyz1.com/IN: not loaded due to errors.

The file: forward.xyz1.com contains the following:

$TTL    604800

@       IN      SOA     dns1.xyz1.com. admin.xyz1.com. (
                              3         ; Serial
                         604820         ; Refresh
                          86600         ; Retry
                        2419600         ; Expire
                         604600 )       ; Negative Cache TTL

; name servers - NS records
    IN  NS  dns1.xyz1.com
    IN  NS  dns2.xyz1.com

; name servers - A records
dns1.xyz1.com.          IN      A       192.168.56.3
dns2.xyz1.com.          IN      A       192.168.56.5

; 192.168.56.0/24 - A records
host1.xyz1.com.         IN      A       192.168.56.6
host2.xyz1.com.         IN      A       192.168.56.8

Can you please point the me what is wrong? I want to dns servers to be:

dns1.xyz1.com
dns2.xyz1.com

and the hosts:

host1.xyz1.com
host2.xyz1.com