DHCP的配置问题

各位大侠：
      今天配置/etc/dhcpd.conf后，用service dhcpd start 后提示FAILED,
     dhcpd.conf的配置文件如下：

ddns-update-style interim;
ignore client-updates;

subnet 192.168.0.0 netmask 255.255.240.0 {

# --- default gateway
        option routers                  192.168.0.3;
        option subnet-mask              255.255.240.0;

        option nis-domain               "xiamenstar.com;
        option domain-name              "xiamenstar.com";
        option domain-name-servers      192.168.0.1;192.168.0.4;

        option time-offset              -18000; # Eastern Standard Time
#       option ntp-servers              192.168.1.1;
#       option netbios-name-servers     192.168.1.1;
# --- Selects point-to-point node (default is hybrid). Don't change this unless
# -- you understand Netbios very well
#       option netbios-node-type 2;

        range dynamic-bootp 192.168.0.1 192.168.0.254;
        default-lease-time 21600;
        max-lease-time 43200;

        # we want the nameserver to appear at a fixed address
#       host ns {
#               next-server marvin.redhat.com;
#               hardware ethernet 12:34:56:78:AB:CD;
#               fixed-address 207.175.42.254;
#       }
}
请问是什么原因啊？　　　　　　
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