New
#11
In that case I'd say that the adaptors aren't compatible or you don't have the correct drivers for those adaptors. Far as I know there is no special requirements for x64 bit Windows 7 and there is no magic button fix for x64 this that I'm aware of. If someone finds that magic button please let me know about it. It could just be a x64 driver problem.
You may need to go to the manufacture's site to get the right drivers. Or perhaps your A/V software or a third party firewall is blocking the connection.
I'm not sure why you felt the need for wireless N adaptors when your router is only wireless G but a router upgrade would really help with the wireless N connections.