Zend Framework and Doctrine

I am trying to integrate Doctrine into my Zend Framework application.

In my index, I do following:

require_once 'Zend/Lo开发者_运维问答ader/Autoloader.php';
$loader = Zend_Loader_Autoloader::getInstance()
->registerNamespace('Doctrine')
->pushAutoloader(array('Doctrine', 'autoload'), 'Doctrine');

 $manager = Doctrine_Manager::getInstance();

as soon as i call doctrine_manager, my zend framework seems to just die after doctrine autoload takes over.

Any idea what I might be doing wrong?

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I've just had a look at my config and the only difference is:

$loader = Zend_Loader_Autoloader::getInstance()->pushAutoloader(array('Doctrine','modelsAutoload'));
$manager = Doctrine_Manager::getInstance();

When you say that you're zend framework dies - are you getting any errors that you can share?