求救：开dhcp服务器时出错，怎么办？

xingmu

配置好了/etc/dhcpd.conf
启动dhcp服务时，报错：Can't bind to dhcp address: Address already in use
我查了67、68端口，都没有被占用啊！

xingmu

贴上dhcp配置文件：
option domain-name "systeng.net";
default-lease-time 6000;
max-lease-time 11400;
authourtative;
ddns-update-style ad-hoc;
log-facility local7;

subnet 192.168.10.0 netmask 255.255.255.0{
range 192.168.10.150 192.168.10.155;
option domain-name-servers 202.99.160.68;
option domain-name "systeng.net";
option netbios-name-servers 192.168.10.1;

option routers 192.168.10.1;
option broadcast-address 192.168.10.255;
default-lease-time 6000;
max-lease-time 11400;
filename "/pxelinux.0";
}