I just tried to authenticate on your site using Windows Live and am getting an error that Microsoft is unable to complete the request. In the URL is the following message:
The+provided+value+for+the+input+parameter+'redirect_uri'+is+not+valid.+The+expected+value+is+'login.live.com/oauth20_desktop.srf'+or+a...s+client+application
Can you double check that you followed step 5 exactly for your site in the
Windows Live application setup guide
? If you did, please let us know what values you set in that step so we can verify further.
Thanks,
Alex