Ruby on rails - basic forms - undefined method `[]' for nil:NilClass - ruby-on-rails-3

Question

I've problem with my "subscriber". It should just add an email to db with symptom active/inactive. It gaves me this error - undefined method `[]' for nil:NilClass
Extracted source (around line #2):
1: <div id="subscriber">
**2: <%= form_for #subscriber do |f| %>**
3: <%= f.label :email %>
4: <%= f.text_field :email %>
5: <%= f.hidden_field :active, :value => true %>
Here is model:
class Subscriber < ActiveRecord::Base
attr_accessor :email, :active
validates_format_of :email, :with => /\A([^#\s]+)#((?:[-a-z0-9]+\.)+[a-z]{2,})\Z/i
def initialize(attributes = {})
attributes.each do |name, value|
send("#{name}=", value)
end
end
def persisted?
false
end
end
This is my view:
<div id="subscriber">
<%= form_for #subscriber do |f| %>
<%= f.label :email %>
<%= f.text_field :email %>
<%= f.hidden_field :active, :value => true %>
<%= f.submit t('.submit') %>
<% end %>
</div>
Here is controller:
class SubscribersController < ApplicationController
def create
#subscriber = Subscriber.new(params[:subscriber])
if #subscriber.valid?
flash[:notice] = "Thx for subscription"
#subscriber.save
redirect_to root_url
else
render :action => 'new'
end
end
end
Here are routes:
resources :subscribers
I'm new with RoR, so if you need some more logs or info let me know. Thx alot.