Game Centre Login Prompt

[Arndreth]

Is there a way to bring up the game-centre login prompt on demand, i've tried both the following

OnlineSubSystemGameCenter(class'GameEngine'.static.GetOnlineSubsystem()).ShowLoginUI();
class'GameEngine'.static.GetOnlineSubsystem().PlayerInterface.ShowLoginUI();

But nothing show's up on my iOS Device when I call them. Could it be something to do with the version of UDK I'm running (November release) or is there another back-door/roundabout way to get it to show up?

[wijesijp]

It seems you can call
class'GameEngine'.static.GetOnlineSubsystem().Play erInterface.ShowLoginUI();
and it will show the log-in screen

But this only works when the player is not logged in. If the player is logged in the screen does not appear.

I tried to log-off the player using
class'GameEngine'.static.GetOnlineSubsystem().Play erInterface.Logout(0);

But it is not working

Any idea how to get this to work?