I was be able to get the ending trigger for runs before allowing the command window. At normal circumstances, the timer will stop when the black cube was placed on the hollow cube in the air. But it doesn't work after enabling the command window.

Make sure you have the fake P keybind set.

[quote]Add a fake input to trace sounds

This is necessary if you want to track the Credits trigger. Inside "\UDKGame\Config\UDKInput.ini" add the following line:

Bindings=(Name="P",Command="ListWaves",Control=False,Shift=False,Alt=False,bIgnoreCtrl=False,bIgnoreShift=False,bIgnoreAlt=False)

Before "bInvertMouse=..."[/quote] via https://bitbucket.org/WydD/antitimer/

It's fixed now, thanks for your help :D