Cannot connect to Endian firewall after restoring backup

view story

http://serverfault.com – i setup endian firewall on a computer based on a Intel Core i5 with 4 intel network interface, i made all the necessary configuration and the firewall is performing well. I've an old computer based on Intel Celeron with 4 mixed (Realtek, Intel, Broadcom) network cards. I'm trying to restore the backup of the first firewall onto the second but when i do: the restore goes fine but i'm unable to reach the firewall from the network. To be more specific on the first firewall i got (4) Eth from 0 to 3 (and if configure the second firewall manually i got there (4) eth from 0 to 3 too. But if i rest (HowTos)