application/
   (...other directories)
   modules/
       admin/
          controllers/
             IndexController.php
          forms/
             Login.php
          views/
             scripts/
                (...view scripts)
          Bootstrap.php

class Admin_Form_Login extends Zend_Form
{
    public function init()
    {

    }
}

class Admin_IndexController extends Zend_Controller_Action {
    public function indexAction()
    {
        $form = new Admin_Form_Login;
     }
}

Fatal error: Class 'Admin_Form_Login' not found in E:xampphtdocsnovoapplicationmodulesadmincontrollersIndexController.php on line 13.

I am not sure what I am doing wrong. anybody, please help me.

resources.modules = []
resources.views = []
resources.frontController.moduleDirectory = APPLICATION_PATH . "/modules"