Probleme DNS du serveur ubuntu

Bonjour,

j'ai un grand problème lorsque je mé :

rndc reload
WARNING: key file (/etc/bind/rndc.key) exists, but using default configuration file (/etc/bind/rndc.conf)
rndc: connect failed: 127.0.0.1#953: connection refused
# sudo /etc/init.d/bind9 restart
* Stopping domain name service... bind9
WARNING: key file (/etc/bind/rndc.key) exists, but using default configuration file (/etc/bind/rndc.conf)
rndc: connect failed: 127.0.0.1#953: connection refused [ OK ]
* Starting domain name service... bind9 [fail]