From my XP client I can ping the internal NIC of server, no problem, and I can access the server and mapping to the share folder no problem at all, however internet connection is where I got stuck.
I have DHCP server and NAT activated on the server, basic friewall coems with W2003 and here is my configuration at server level
External Card Server
DNS: 18.104.22.168 (It's the DNS of my ISP)
Internal Card Server
As for client, no firewall there, I disabled the protection
Hope someone can help, thanks very much