Architecture / Installation

hi.

get blank page after successfully following instructions on auto-install.

need help with install on:
apache2.0,PHP5.2.5,MySQL5.0.45(installed with WebDeveloperSuite)
all other applications MediaWiki, Joomla, Drupal, other php web apps work fine!
i want to install TikiWiki in it's own folder under a folder called webapps
this is not under the localhost root folder(this is where the main company's intranet site runs)
ie: http://intranet/tikiwiki/

p.s.: installed successfully on localhost using xampp for windows
tikiwiki was installed in its own folder.
ie: http://localhost/tikiwiki/

please help!

thank you.