DNS configuration is always unavailable. Please take a look !!!

DNS configuration is always unavailable. Please take a look !!! -- Linux Enterprise Application-Linux server application information. For details, refer to the following section. Master configuration file named. conf
Options
{
Query-source port 53;
Query-source-v6 port 53;
Directory "/var/named"; // the default
Dump-file "data/cache_dump.db ";
Statistics-file "data/named_stats.txt ";
Memstatistics-file "data/named_mem_stats.txt ";

};
Include "/etc/named. rfc1912.zones ";
Zone "syctsedu.edu" IN {
Typemaster;
File "syctsedu.edu ";
Allow-update {none ;};
};
Zone "Limit 192.in-addr. arpa" IN {
Typemaster;
File "192.168.2.rev ";
Allow-update {none ;};
};


Named. rfc1912.zones:
Zone "." IN {
Typehint;
File "named. ca ";
};
Zone "localdomain" IN {
Type master;
File "localdomain. zone ";
Allow-update {none ;};
};

Zone "localhost" IN {
Type master;
File "localhost. zone ";
Allow-update {none ;};
};

Zone "0.0.127.in-addr. arpa" IN {
Type master;
File "named. local ";
Allow-update {none ;};
};

Zone "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa" IN {
Type master;
File "named. ip6.local ";
Allow-update {none ;};
};

Zone "255. in-addr.arpa" IN {
Type master;
File "named. broadcast ";
Allow-update {none ;};
};

Zone "0. in-addr.arpa" IN {
Type master;
File "named. zero ";
Allow-update {none ;};
};


Forward domain syctsedu.edu:
$ TTL86400
@ IN SOAns.syctsedu.edu. root.ns.syctsedu.edu .(
42; serial (d. adams)
3 H; refresh
15 M; retry
1 W; expiry
1D); minimum

IN NSns.syctsedu.edu.
Ns IN A192.168.2.252

Reverse resolution file 192.168.2.rev:
$ TTL86400
@ IN SOAns.syctsedu.edu. root.ns.syctsedu.edu .(
42; serial (d. adams)
3 H; refresh
15 M; retry
1 W; expiry
1D); minimum

IN NSns.syctsedu.edu.
252 IN PTRns.syctsedu.edu.

The DNS is configured on the host 192.168.2.252. The system uses the Fedora Core 6 installed on the virtual machine, and the Bind is the 9.3.2 that comes with the CD.
There is no error in starting the named service. The result of the host Command query is as follows. I don't know where it is always. Please help me diagnose it !!!