redhat as 4 dns 问题

安装好bind（9.2.4）后，启动named正常，但rndc status查询状态，却报错，怎么解决？
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rndc: connection to remote host closed
This may indicate that the remote server is using an older version of
the command protocol, this host is not authorized to connect,
or the key is invalid.
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系统已有key了。　　　　　　

rndc 是如何配置的?　　　　　　

安装系统时选择“全部安装”。