Problem can anybody help

I am running ipb on vbulletin 3.6.
The games work fine until i get a highscore then i get the following error:

Warning: Cannot modify header information - headers already sent by (output started at /home/nzwarrio/public_html/forum/index.php:56) in /arcade.php on line 3296

Is there a way to stop the highscore being shown on the index page or is that just the way it is set up. So instead of it being:
/index.php?act=Arcade&do=newscore
maybe something like
/arcade.php?act=Arcade&do=newscore

Thaanks in advance.