Shot Names in BIND DNS take too Long

I have Setup A Bind DNS , where I am trying to put an entry for resolving the short name. This get resolved but take too long and sometime the DNS times out.
The short name is s3.ngsfdellpe

Entries from named.conf

options {
    listen-on port 53 { 127.0.0.1;10.209.194.15; };
    listen-on-v6 port 53 { ::1; };

    directory   "/var/named";
    dump-file   "/var/named/data/cache_dump.db";
        statistics-file "/var/named/data/named_stats.txt";
        memstatistics-file "/var/named/data/named_mem_stats.txt";
    allow-query {any;};
    allow-recursion {any;};
    //recursion no;

    //dnssec-enable yes;
    //dnssec-validation yes;

    //dnssec-lookaside auto;

    /* Path to ISC DLV key */
    bindkeys-file "/etc/named.iscdlv.key";

    managed-keys-directory "/var/named/dynamic";
};

logging {
        channel default_debug {

                file "data/named.run";
                severity dynamic;
        };
};

zone "." IN {
    type hint;
    file "named.ca";
};



zone"vxctf8500.com" IN {
type master;
file "forward.vxctf8500.com";
allow-update { none; };
};
zone"106.209.10.in-addr.arpa" IN {
type master;
file "reverse.vxctf8500.com";
allow-update { none; };

};

Forward zones Files ::

$TTL 1D
@   IN SOA ns1.vxctf8500.com. root.vxctf8500.com. (
                    0   ; serial
                    1D  ; refresh
                    1H  ; retry

                    1W  ; expire
                    3H )    ; minimum

       IN NS       vxctf8500.com.
       IN A     10.209.194.15



ns1   IN A 10.209.194.15


s3.ngsfdellpe   IN  A   10.209.106.59
s3.ngsfdellpe   IN  A   10.209.106.53
s3.ngsfdellpe   IN  A   10.209.106.54
s3.ngsfdellpe   IN  A   10.209.106.55
s3.ngsfdellpe   IN  A   10.209.106.56

Reverse zone files ::

$TTL 1D

@   IN SOA  ns1.vxctf8500.com. root.vxctf8500.com. (
                    0   ; serial
                    1D  ; refresh
                    1H  ; retry
                    1W  ; expire
                    3H )    ; minimum


                        IN NS   vxctf8500.com.
15                      IN PTR      ns1.vxctf8500.com.




59       IN PTR      s3.ngsfdellpe.
53       IN PTR      s3.ngsfdellpe.
54       IN PTR      s3.ngsfdellpe.
55       IN PTR      s3.ngsfdellpe.
56       IN PTR      s3.ngsfdellpe.