DNS not working

I added DNS zone in ISPConfig > DNS, but domain is not resolving.

I checked /var/named file, i can see file with .err extension with the zone data.

Code:

[root@server named]# nslookup vps7.ovh 54.37.55.240
Server:        54.37.55.240
Address:    54.37.55.240#53

** server can't find vps7.ovh.vps7.ovh: REFUSED

[root@server named]# ls -la
total 48
drwxr-x---.  6 root  named 4096 Dec  6 16:04 .
drwxr-xr-x. 23 root  root  4096 Dec  6 00:23 ..
drwxrwx---.  2 named named 4096 Dec  6 00:22 data
drwxrwx---.  2 named named 4096 Nov 30 14:29 dynamic
-rw-r-----.  1 root  named 2281 May 22  2017 named.ca
-rw-r-----.  1 root  named  152 Dec 15  2009 named.empty
-rw-r-----.  1 root  named  152 Jun 21  2007 named.localhost
-rw-r-----.  1 root  named  168 Dec 15  2009 named.loopback
-rw-r--r--   1 named named  715 Dec  6 16:04 pri.hosthat.com.err
-rw-r--r--   1 named named  683 Dec  6 15:50 pri.vps7.ovh.err
drwxrws---.  2 named named 4096 Dec  6 00:23 slave
drwxrwx---.  2 named named 4096 Nov 30 14:29 slaves
[root@server named]# 

Any idea why the zones are not creating ? Is there a log file where i can see the reason for creating zone file with .err extension ?

 

Thanks. Got it working by adding A record for ns1 and ns2, this happens if the domain you adding is using name servers under same domain.