Blank Page After Switching Hosts

Hey…
I used the instructions given here:
http://codex.wordpress.org/Moving_WordPress
to move a wordpress installation (with the method that says it is for when you don’t care if the old installation still works) and I get blank everything — home page, wp-admin, wp-login, literally every page owned by wordpress is blank. I’ve tried other pages that are on the same server but that live outside of the wordpress directory and all is well with those. Does anyone know what the problem could be, and/or how to fix it? I’ve already searched the forums for “blank page” and “blank screen” but didn’t find anything usefull. By the way, the files are hosted on a Mac OS X Tiger server (client edition with server features turned on) and I used the PHP and MySQL installation instructions found here:
http://www.freemacblog.com/mac-server-series-setting-up-php-and-mysql/

Thanks a ton in advance for any help you have to offer!

-Stephen