Zend form error

I am beggining to learn zend framework.
So i try to create a simple form but it does not work.At my controller there is the error class Form_MyTest not found
I made the MyTest.php at aplication/forms and here the form class has the name

class Form_MyTest extends Zend_Form

and at bootstrap.php I has this code,what is wrong,I use xampp

class Bootstrap extends Zend_Application_Bootstrap_Bootstrap
protected function _iniAutoLoad()
 $autoLoader = Zend_Loader_Autoloader::getInstance();
        //$autoLoader->registerNamespace(array( ));
        $resourceLoader = new Zend_Loader_Autoloader_Resource(array(
            'basePath'  => APPLICATION_PATH,
            'namespace' => '',
            'resourceTypes'     =>
                    array('path'        => 'forms/',
                        'namespace'     => 'Form_'
        return $autoLoader;