Black screen when trying to point to install.php

Hi there

I installed WordPress on another site I have the other day…followed the readme without any problems. However, tonight I have tried installing wordpress on another site that I’m doing for someone else, and I just have a blank screen when trying to navigate to http://www.[sitename].com/wp-admin/install.php.

I have checked my wp-config.php file…and am just about to check it again. Is an error with this the likely cause of the problem? Help!