Server error log when running accepts_nested_attributes_for

\app\models\user.rb

  class User < ActiveRecord::Base
    has_many :events, :dependent => :destroy
   accepts_nested_attributes_for :events, :reject_if => lambda { |attributes|      attributes['event_name'].blank? }, :allow_destroy => true

   attr_accessible :name
   
  end

form partial

<label>Name of event:
   <p> <%= builder.text_area :event_name, :rows => 1 %> </p>
   </label>
   
  <label>Tracks   
	<p><%= builder.text_area :tracks, :rows => 1 %><p>
	</label>
	
	<label>Event starts:
    <p><%= builder.text_area :starts_at, :rows => 1 %> <p>
	</label>
	
	<label>Event Finishes:
    <p><%= builder.text_area :finish, :rows => 1 %><p>
    </label>	
   </p>
   
  <% end %>

gistfile1.txt

ActionView::Template::Error (undefined method `events' for nil:NilClass):
    9:   </tr>

    10:   <td>

    11:  

    12:   <% @user.events.each do |event| %>

    13:   <tr>

    14:     <td><%= event.starts_at %></td>

    15:     <td><%= event.finishes %></td>

  app/views/users/index.html.erb:12:in `_app_views_users_index_html_erb___603337143_36309060_0'

Rendered C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-3.0.1/lib/action_dispatch/middleware/templates/rescues/_trace.erb (0.0ms)
  User Load (0.0ms)  SELECT "users".* FROM "users" ORDER BY name asc
Rendered C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-3.0.1/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (15.6ms)
Rendered C:/Ruby/lib/ruby/gems/1.8/gems/actionpack-3.0.1/lib/action_dispatch/middleware/templates/rescues/template_error.erb within rescues/layout (62.5ms)

index.html.erb

<% title "Events" %>
 
<table >
   <tr>
   <th><%= sortable "Starts_at" %></th>
	<th><%= sortable "Finishes" %></th>
	<th><%= sortable "Event_name" %></th>
	<th><%= sortable "Tracks" %></th>
  </tr>
  <td>
 
  <% @user.events.each do |event| %>
  <tr>
    <td><%= event.starts_at %></td>
    <td><%= event.finishes %></td>
    <td><%= event.event_name %></td> 
	<td><%= event.tracks %></td> 
  </tr>
<% end %>

 </table>
  
 <%= link_to "Add new event", new_user_path %>

 <%= button_to "Delete", @user,:confirmation => "Are you sure?", :method => :delete %>

schema

 ActiveRecord::Schema.define(:version => 20101201180355) do

  create_table "events", :force => true do |t|
    t.string   "event_name"
    t.string   "tracks"
    t.datetime "starts_at"
    t.datetime "finish"
    t.datetime "created_at"
    t.datetime "updated_at"
    t.integer  "user_id"
  end

  create_table "users", :force => true do |t|
    t.string   "name"
    t.datetime "created_at"
    t.datetime "updated_at"
  end

end

users_controller.rb

class UsersController < ApplicationController
  
 
 respond_to :html, :xml, :js
 
 def index
  @users = User.all
 end

 def new
  debugger
  @user = User.new
  
    1.times do
     event = @user.events.build
    #event = @user.build_event
    end
  
  end
  
  def create 
  @user = User.new(params[:user])
  if @user.save
    flash[:notice] = "New user created"
    redirect_to user_url(@user)
    else 
	flash[:notice] = " User not created"
	redirect_to new_user_url
	end
  end
  
  def show
   @user = User.find(params[:id])
   end
   
   def edit
	@user = User.find(params[:id])
	end
	
	def update
	@user = User.find(params[:id])
	  if @user.update_attributes(params[:user])
	   flsh[:notice] ="successfully updated."
	     redirect_to @user
	  else
	      render :action => 'new'
	  end
	end
	
	def destroy
	@user = User.find(params[:id])
	@user.destroy
	flsh[:notice] ="successfully deleted user."
	redirect_to @user
	end