cpprestsdk example Facebookdemo120 doesn't work

Jan 17 at 12:15 AM
hi all,
after lots of try on VS2013 i excluded from build cpprestsdk120.winrt ,.wod .wp81 and .wps81 project from build solution .
Actually it builds but when i click on login it says (in italian)
"Impossibile to connect to the service now. Check internet connection or try again later"

I just want to run this example for understand better Restful services via Casablanca.
Suggestions?
Thanks in advance