FreeBSD DHCP client not working with dynamic DNS

[Gerard Samuel]

Box 1:  Firewall/DHCP Server/DNS (FreeBSD 5.3)
Box 2:  DHCP Client (FreeBSD 5.3R2)

When I boot Box 2, it gets its IP address, but DNS doesn't
get updated, so Box 2 is unknown to the LAN via its hostname.
If I boot a windows box (tested with 2000/XP), and I've tested with a
networked printer, they get an IP address, and DNS is updated
for those devices.

Any help would be appreciated.
Thanks

---
Box 1

/usr/local/etc/dhcpd.conf
--
option domain-name "trini0.org";
option domain-name-servers 192.168.0.1;
option subnet-mask 255.255.255.0;

default-lease-time 3600;
max-lease-time 86400;

subnet 192.168.0.0 netmask 255.255.255.0 {
  range 192.168.0.10 192.168.0.20;
  option routers 192.168.0.1;
}

# DNS
ddns-update-style interim;
ddns-domainname "trini0.org";
ddns-rev-domainname "in-addr.arpa";

key DHCP_UPDATER {
  algorithm HMAC-MD5.SIG-ALG.REG.INT;
  secret my_key;
};

zone trini0.org. {
  primary 192.168.0.1;
  key DHCP_UPDATER;
}

zone 0.168.192.in-addr.arpa. {
  primary 192.168.0.1;
  key DHCP_UPDATER;
}
--

/var/named/etc/namedb/named.conf
-- snip --
key DHCP_UPDATER {
        algorithm HMAC-MD5.SIG-ALG.REG.INT;
        secret my_key;
};

zone "." {
        type hint;
        file "named.root";
};

zone "0.0.127.IN-ADDR.ARPA" {
        type master;
        file "master/localhost.rev";
};

zone "trini0.org" {
        type master;
        file "master/trini0.org";
        allow-update { key DHCP_UPDATER; };
};

zone "0.168.192.in-addr.arpa" {
        type master;
        file "master/trini0.org.rev";
        allow-update { key DHCP_UPDATER; };
};
-- snip --


Box 2
--
/etc/rc.conf
-- snip --
ifconfig_fxp0="DHCP"
-- snip --