Rails - Jan 2008 - Error in validation

I have the following model
==========================
class SoftwareCi < ActiveRecord::Base
  has_one :ci, :as => :content
  has_one :primary_group
  validates_presence_of :name, :message => "can''t be
empty"
end

The controller
===============
def create
  @software_ci= SoftwareCi.new(params[:ci])
  redirect_to :action => ''create_ui''

end


The rhtml, create_ui,  I have given the following
======================
<% unless @software_ci.errors.empty? %>
  Error occurred!
  <ul>
  <% @software_ci.errors.each_full do |message| %>
    <li><%= message %></li>
  <% end %>
  </ul>
<% end %>

The problem
===============I get the following error in the view

You have a nil object when you didn''t expect it!
You might have expected an instance of ActiveRecord::Base.
The error occurred while evaluating nil.errors



Could you please help me?
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