我的自定义设计登录表单有什么问题？

Question

<%= simple_form_for(resource, :as => resource_name, :url => session_path(resource_name)) do |f| %>
        <div class="login">
            <li><%= f.label :email %> <%= f.text_field :email %></li>  
        <li><%= f.label :password %> <%= f.password_field :password %></li> 
        </div><!-- login -->

        <div class="reset">
            <%= f.input :email, :required => false, :autofocus => true %>
            <%= f.input :password, :required => false %>
            <%= f.input :remember_me, :as => :boolean if devise_mapping.rememberable? %>
        </div>

      <div class="login">
        <%= f.button :submit, "Sign in" %>
      </div>
    <% end %>

表单只是重定向回自身。