Windows 7: Unidentified network. HELP ME!

Hi,
I'm on Windows 7 32 bit.
2 network card in your PC. One of them stuck on the Internet, to another on the Xbox 360. The internet is working but the Xbox 360 Amra it says: Unidentified network. Swap the cables, even if it is the same. If it flips to that which you can plug it into your internet does not work. Would be very important. THX in advance.

PS: Sorry for my bad Angol, it's not my native tongue.

It sounds in essence that you are basicly creating an ad hoc network using your second NIC with your Xbox. First be aware, depending upon the NIC(s) on both devices, older cards do not support auto midx (automatically crossing over a straight cat 5) so a cross over cable may be required. Other wise read this article Using ICS (Internet Connection Sharing) it's a vista walkthrough but the technique is the same. And also since it is an ad hoc network please read the three caveats regarding ics and ad hoc networks at the bottom of the article.
Hope this helps.

thank you!