I'm not sure how to get the specs needed for this question, but i'll give what I know.
Windows XP, trying to connect to Nintendo Wii or XBOX 360 using a BUFFALO WLI-U2-KG54-YB Wireless LAN Adapter.
My Wii can find the access point, then when it tries to connect I get an error saying 'Cannot connect to Internet'.
Firewall is turned off during connection testing.
I am using a computer without a router to do this. I am sharing internet without another computer on the other side of the house via wired router connection.

Thanks for any suggestions!

Side note: I have the official Nintendo Wi-Fi adapter and it works perfectly on my computer and Wii so I can't see why Buffalo doesn't.

Do not question me, unless you have a question