Blank page when completed

Sorry, i am bad at English.
When i install ibProArcade completed ( upload file + import XML )
vBulletin 3.7.3 and ibProArcade v2.6.7a+
and i go to : arcade.php but it's white page ... nothing.
after, i go to ACP like as picture, you can see below

http://img396.imageshack.us/my.php?image=123sr0.png

Help me ...

[NemoTech]

Same. I refreshed and aracde showed up but I am getting tonnes of white pages across the board when I use arcade.

White page when I try to view high scores.
White page when a user finishes the game.



I also have vb 3.7.3