subdomain/zone with DHCPD

[lejeczek]

hi everybody

I'm trying a bind setup which could be talked to by dhcpd.
I've bind setup with virtual zones and now trying to set up 
dhcpd so it would be updating DNS, but... but.

In dhcpd.conf I'm trying:

subnet 192.168.4.64 netmask 255.255.255.224 {
   ddns-domainname "host.domain.my";
   ddns-rev-domainname "in-addr.arpa";
   option domain-name-servers  192.168.4.65;
   option domain-name          "host.domain.my";
   option host-name = config-option server.ddns-hostname;
   option broadcast-address    192.168.4.95;
   option routers              192.168.4.65;
   one-lease-per-client on;

   zone host.domain.my. {
     primary 127.0.0.1;
     key dhcpd;
   }
   pool {
     range dynamic-bootp  192.168.4.66 192.168.4.93;
     allow unknown-clients;
     default-lease-time    86400;
     #default-lease-time    3600;
     max-lease-time        10000;
   }
}

hoping that virtual zone in DNS server which parent 
zone/domain is "domain.my" would get updated as dhcpd 
clients request IPs.

parent/main BIND zone config:

$TTL 86400  ; 1 day
$ORIGIN domain.my.
@ IN SOA host.domain.my. root.host.domain.my. (
         102        ; serial
         10800      ; refresh (3 hours)
         3600       ; retry (1 hour)
         604800     ; expire (1 week)
         3600       ; minimum (1 hour)
         )
       NS  host.domain.my.
       A   192.168.2.110
host A   192.168.2.110

; virtual  subdomain a.k.a subzone, for virt guest on this host
$ORIGIN host.domain.my.

virt  A   192.168.4.65

If it is looking a bit confusing it's because I'm trying:
for domain - "domain.my" - whose bind server is - 
"host.domain.my" - have this same box to be a host for virt 
guests.
So essentially virt guests would be:
guest-1.host.domain.my
guest-2.hos...
etc, so for guests host.domain.my would be their DNS domain.

DNS as such is working but I cannot get DHCP to do its part. 
I thought it was simple, seemingly..
Can you help? (I'm in the process of signing up to dhcp list)
many thanks.