eh si, mi era proprio sfuggito, ora quasi funziona...
quasi perche mi è un pò oscura questa cosa:
Privacy Policy URL
* The URL of the page on your Web site, called the privacy policy URL, to which the Windows Live ID consent service redirects users to view the privacy policy of your Web site. You must create a page on your site corresponding to the return URL, to handle the response from the consent service.
come deve essere fatta?