Domain Resolution Issue

[Mario Vega]

Hello,

We are experiencing an issue with resolution of a domain, roadwire.com, on our
gateway email server running 4.5-stable.  The server is running named with
/etc/resolv.conf set to 127.0.0.1.

NXDOMAIN is returned when performing an nslookup or dig on roadwire.com. 
However, if a "rndc flushname roadwire.com" is issued, then the domain resolves
correctly for a period of time (ttl I imagine, yet to confirm).

Named is configured to forward to our internal name servers.  During the times
that named returns NXDOMAIN, the internal name servers can be queried and
correctly return the record.

Below is our named.conf.  Any recommendations on troubleshooting this issue
would be greatly appreciated.

Thank you,
mv

-- 

options {
        version "";
        listen-on    { 127.0.0.1; };
        listen-on-v6 { none; };
        empty-zones-enable yes;
        allow-recursion { 127.0.0.1; };
        clients-per-query 30;
        forwarders { 192.168.2.2; 192.168.2.4; };
        forward only;
};

logging {
        category lame-servers { null; };
};

zone "localhost" {
        type master;
        file "standard/localhost";
        allow-transfer { localhost; };
};

zone "localhost" {
        type master;
        file "standard/localhost";
        allow-transfer { localhost; };
};
        
zone "127.in-addr.arpa" {
        type master; 
        file "standard/loopback";
        allow-transfer { localhost; };
};