Bind9 dns

sil vous plait aidez-moi

http://doc.ubuntu-fr.org/bind9

voici mes configuration
;
; Configuration de la zone directe
;
$TTL 604800
@ IN SOA serv-web.stjo.edu. root.stjo.edu. (
2 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800 ) ; Negative Cache TTL
;
@ IN NS serv-web.stjo.edu.
serv-web IN A 192.168.3.254
www IN CNAME serv-web
;
; Configuration de la zone inverse
;
$TTL 604800
@ IN SOA serv-web.stjo.edu. root.stjo.edu. (
1 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800 ) ; Negative Cache TTL
;
@ IN NS serv-web.stjo.edu.
254 PTR serv-web.stjo.edu.

/etc/resolv.conf
# Generated by NetworkManager
domain stjo.edu
search stjo.edu
nameserver 192.168.3.254

/etc/hosts
192.168.3.254 serv-web.stjo.edu serv-web.
192.168.3.254 www.stjo.edu
127.0.0.1 localhost.localdomain localhost
127.0.0.1 stjo.edu

# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

alor svp que dois-je corrigé

root@serv-web:/etc/bind# nslookup 192.168.3.254
Server: 192.168.3.254
Address: 192.168.3.254#53

254.3.168.192.in-addr.arpa name = serv-web.stjo.edu.

root@serv-web:/etc/bind# nslookup serv-web.stjo.edu
Server: 192.168.3.254
Address: 192.168.3.254#53

Non-authoritative answer:
Name: serv-web.stjo.edu
Address: 67.215.65.132

root@serv-web:/etc/bind# nslookup serv-web
Server: 192.168.3.254
Address: 192.168.3.254#53

** server can't find serv-web: NXDOMAIN

Voici mes resulat avec nslookup,svp d"ou vient le probleme?