Why can't my game centre register? I need help

[Mikidance78]

My game centre won't work. When I register and finish, it goes back to my username and I go through again and it's all right but it will never register. I have tried a million times but it still won't work!!! Please can someone help me?!?

 

[phreddyl]

try force closing the app and then reboot phone and try again