[FnCool]

k, i just tried to run it and got this:
Fatal error: Unknown: Failed opening required '/www/iheroes.hostoi.com/forums/shoutbox_setup/index.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in Unknown on line 0

somehow, your path is set wrong
there should not be a "/www/" but i'm unsure what/where it's wrong from that message.

i'm thinking
require( "./core/conf.php" );
should be:
require( "core/conf.php" );

maybe someone with more IPBoard experience will reply

also, i see you have no index page, maybe you want to just move the whole forum to public_html and have it as your index.