Hello friends

i have some project to build NAT-PT configuration to my LAN Network. These are condition of my network :
1. I have DHCP and DHCPv6 work properly.
2. only have one switch
3. two DNS servers for IPv4 and IPv6.
4. two client (not dual stack)

To complete this project, i build NAT-PT to connect IPv4 and IPv6 host then i use naptd 4.0 i386 rpm from Mr Lucas tomicky
(tomicki.net/ipv6.router.php). I follow the steps but i got some problem :
my network always give "connect network unreahcable" when i ping from ipv6 host to ipv4 through i configured my Ip6tables to DROP packet unreachable like Mr lucas told in his site.

I build dual stack server for NAT-PT with address 192.168.123.7 and 2001:1234:5678:ffff::7/64.

I configured Naptd-confmaker then ping from IPv6 host to 192.168.123.7 (server nat-pt Ipv4).

Do i got some mistake ?