I can recieve challenges from xbox friends, I can do the challenge, but when I go to "complete challenge" I get an error message about unable to contact Kinect Sports: Season Two servers, try again later. I have never gotten it to work. However, I can complete the challenge if I do it between 2 xbox live accounts on the same xbox console. I have no other xbox live problems with any other games or playing with xbox friends on any other game. I have tried reseting the xbox to default settings and I have moved the Season Two game data to a USB drive. Any other ideas?