dhcp server returns core dump when i define network with mask 8

[s m]

hello all,
i have a question about dhcpd in freebsd8.2 . when i define my network like
below in dhcpd.conf file, server doesn't run correctly and return core
dump!!!!
this is my dhcpd.conf file:

ddns-update-style none;
log-facility local7;
subnet 192.0.0.0 netmask 255.0.0.0 {
    range 192.0.0.1 192.255.255.255;
}

 i want to define a network with mask 8. is this config wrong? if yes, how
should i define it?

thanks in advance,
SAM