I have a Windows 7 (1) desktop and a Windows XP desktop (2).
1 has a wireless connection to my router, but 2 doesn't.
I bridged 1 & 2, But 2 still isn't getting an internet connection.
So make sure you have a ethernet cable going from 1 to 2. On 1 make sure you go into your network and sharif center>adapter settings>select the wireless adapter and the ethernet cable and then create a bridge. If you have this you could try diagnosing the connexion on 2