also-notify

[Oleg Prokopyev]

Hi
I got  question about "also-notify"

i have the following :

zone "xxx.xxx" {
        type master;
        file "xxx.xxx";
        allow-transfer {
                x.x.x.x;
        };
        also-notify y.y.y.y;
};

but NOTIFY is not sent to y.y.y.y

whats the reason?