strange DNS behavior

[Adel ESSAFI <adel essafi laposte net>]

hi list
I have instaled a dns server (FC4)  as a master on utic.rnu.tn domain
on the server , I don t succeed to resolv the hist ordi1.utic.rnu.tn
How ever, on an other host (xtrem) , I can resolv this host .
do you have an idea of what this problem could be
thanks
ON THE SERVER
[root localhost named]# hostname
localhost.localdomain
[root localhost named]# ping ordi1.utic.rnu.tn
ping: unknown host ordi1.utic.rnu.tn
[root localhost named]#
ON THE HOST
[root xtrem ~]# hostname
xtrem
[root xtrem ~]# ping ordi1.utic.rnu.tn
PING ordi1.utic.rnu.tn (193.95.34.232) 56(84) bytes of data.
64 bytes from 193.95.34.232: icmp_seq=0 ttl=64 time=0.048 ms
64 bytes from 193.95.34.232: icmp_seq=1 ttl=64 time=0.030 ms

--- ordi1.utic.rnu.tn ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 5022ms
rtt min/avg/max/mdev = 0.030/0.039/0.048/0.009 ms, pipe 2
[root xtrem ~]#