Zend Framework Installation

We just built an ispconfig environment running the latest version of Ubuntu. All pathing seems to be correct, but we are still unable to run any simple tests. For example, if I run the following below:
<?php
//require_once "Zend_Loader.php";

try
{
echo 'test start';
Zend_Loader::loadClass('Zend_Session');
echo 'test good';
}
catch (Zend_Exception $e) {
echo "Error message: " . $e->getMessage() . "\n";
}
?>

I see the test start, but I never see the test good or an error message. The system appears to never run the Zend_Loader or provide an exception. I turned on debug level logging, but still there is not error messages. I was wondering if the suhosin potentially causing this problem? Which log files should I be looking at to find why the Zend_Loader is not executing?

Thanks,

 

Take a look at Apache's error log.