i recieve this error code when working from my pc attempting to connect to login with the GFWM client. Also, i am unable to login at login.live.com. i get an error stating that "site may be down, site may not be a member of windows live network"
Okay, so in addition to not being able to log into the Games for Windows Marketplace you are also unable to sign in to live.com? But you can sign here on xbox.com?
One thing to try is to delete your temporary Internet files and cookies in Internet Explorer. Also try everything in the connection troubleshooting threads: