That typically happens if a PHP error is occurring on the page. While there's no error shown in the screenshot you provided, there may still be one.
While it feels a little unlikely to be the exact solution, try making this code change, and see if it helps: http://www.zen-cart.com/forum/showpo...23&postcount=5
Failing that, try editing /zc_install/includes/installer_params.php and change the STRICT_ERROR_REPORTING from FALSE to TRUE. Then try again, and report any error messages you see.




