bind-9.2.4-16.EL4 problem

[Shaheen]

Hi,
Am facing a really weird problem with mentioned version of bind.
my network scenario is as follows
3 bind-9.2.4-16.EL4 on FC5 behind PIX firewall,
Most of internet queries are successful but some fails and log file
does not show errors.
when i try to restart named i get the following
[root at localhost /]# /etc/init.d/named restart
Stopping named: [  OK  ]
Starting named: failed already running
[root at localhost /]#  /etc/init.d/named start
Starting named: [  OK  ]

and after that every thing even names were not resolving begin
resolving fine!
why is this happeneing,
my primary named.conf looks like this
options {
        directory "/var/named";
        dump-file "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        version "Get Lost";
        allow-query { any; };
        allow-recursion { localhost; trusted; };
        blackhole { badguys;  };
        notify yes;
        datasize default;
        max-cache-size 800000000;
        allow-transfer { secondaries; };
        also-notify {x.x.x.x; y.y.y.y;}; // all zones
        allow-notify { secondaries; };
        recursive-clients 30000;
        pid-file "named.pid";
};


logging {
category lame-servers { null; };





channel "default_debug" {
    file "/var/log/named/named.log" size 5m;





    severity critical;

 };
};
controls {
        inet x.x.x.x allow { x.x.x.x; } keys { "rndckey"; };
};