Problem with getting POST variables

I have a strange problem with getting POST variables. I'm using bootstrap 3.2, here is my form :

    <div class="col-sm-6" style="margin-left: 25%;">
    <form role="form" action="/home/sign-in" method="post">
        <div class="form-group">
            <label for="exampleInputEmail1">Email address</label>
            <input type="email" class="form-control" id="exampleInputEmail1" placeholder="Enter email">
        </div>
        <div class="form-group">
            <label for="exampleInputPassword1">Password</label>
            <input type="password" class="form-control" id="exampleInputPassword1" placeholder="Password">
        </div>
        <button type="submit" class="btn btn-default">Sign in</button>
    </form>
    </div>

And the action :

    public function signinAction()
    {
        var_dump($_POST);
        var_dump($this->request->getPost());
        exit;
        if (!$this->request->isPost()) {
            return $this->response->redirect('/');
        }

        $usersModel = new Users();

        if (($usersModel->getEmail() == $this->request->getPost('email')) &&
            ($usersModel->getPassword() == $this->request()->getPost('password'))
        ) {
            $this->session->set(array('signin' => true));
            return $this->response->redirect('/admin/dashboard');
        }

        $this->flashSession->error('Email/Password are wrong, please try again!');
    }

When I'm dumping the POST variable there is nothing inside :

    array (size=0)
        empty
    array (size=0)
        empty