Vista - Problem setting up a wired Home Network with Internet

Hello , I am new here and I'm also new to Vista so please bear with me. I recently installed Vista Ultimate x64 and when I tried to set-up my Home Network with Internet i bumped on a "Unidentified Network" message. The network settings and map are like this : Internet -> Broadband Modem -> PC ethernet card 1 ( IPv4 - automatically assigned by DHCP, internet connection shared ) -> PC ethernet card 2 (IPv4 - 192.168.1.1 , no gateway , same DNS as IP ) -> Switch -> My other 2 PCs at home ( IPv4 , 192.168.1.2-3, Gateway: 192.168.1.1 , DNS: 192.168.1.1 ) . This are the settings i was using prior to installing Vista when i was still running Windows XP, and they were working fine. Does anyone knows what am i doing wrong and how can i get rid of the "Unidentified Network" message? Any help would be appreciated.
Also, i am running Windows XP on my other 2 PCs.