Sorry, you can't run the check script directly. It is part of the installer and must be launched by /installer/index.php.
Nethertheless I see from the error log that it failed on line 47. There is the PHP version check located. So it looks like you do not have at least PHP 5.2.0. Unlike than v0.1 recent v0.2 requires at least PHP 5.2.0!
start check.php line 44
define('MIN_PHP_VERSION', '5.2.0');
if (version_compare(PHP_VERSION, MIN_PHP_VERSION, '>=')) {
$RCI->pass('Version', 'PHP ' . PHP_VERSION . ' detected');
} else {
$RCI->fail('Version', 'PHP Version ' . MIN_PHP_VERSION . ' or greater is required ' . PHP_VERSION . ' detected');
}