Quote Originally Posted by mc12345678 View Post
So one thing that comes to mind is that your PHP version is 5.4... Supposedly ZC Version 1.5.2 is being evaluated for distribution to work with PHP 5.4 (because supposedly 1.5.1 and below may not/will not work with PHP 5.4)... So, this may be why (and I have no test ground to confirm) the installation is not offering the ability to move forward. Are you able to downgrade your version of PHP to 5.3 or 5.2? The other alternative may be to implement the "unreleased" version of 1.5.2 or if it was not the problem with PHP 5.4 that required you to upgrade to instead return to your backup of your site at version 1.3.9h?
Tend to disagree: ZC 1.5.1 works with PHP 5.4, one of my clients even runs a heavily modified 1.3.9h live site on PHP 5.4 - without a single glitch.

@johnnycascio

download a fresh version of the zc 1.5.1 install files and start from scratch - the ZC installer has never failed me in more than 6 years of running this software.