Rails - Jun 2006 - No opening form tag in rendered HTML

I cannot get my form to submit for my simple blog site (based on the "How
to Build a Blog Engine in 15 Minutes" presentation)

Any ideas?

Thanks,
Tom

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Here is my code:

#Post controller
class PostsController < ApplicationController
  def index
    list
    render :action => ''list''
  end

  # GETs should be safe (see http://www.w3.org/2001/tag/doc/whenToUseGet.html)
  verify :method => :post, :only => [ :destroy, :create, :update ],
         :redirect_to => { :action => :list }

  def list
    @post_pages, @posts = paginate :posts, :per_page => 10
  end

  def show
    @post = Post.find(params[:id])
  end

  def new
    @post = Post.new
  end

  def create
    @post = Post.new(params[:post])
    if @post.save
      flash[:notice] = ''Post was successfully created.''
      redirect_to :action => ''list''
    else
      render :action => ''new''
    end
  end

  def edit
    @post = Post.find(params[:id])
  end

  def update
    @post = Post.find(params[:id])
    if @post.update_attributes(params[:post])
      flash[:notice] = ''Post was successfully updated.''
      redirect_to :action => ''show'', :id => @post
    else
      render :action => ''edit''
    end
  end

  def destroy
    Post.find(params[:id]).destroy
    redirect_to :action => ''list''
  end
  
  #def to control submitting ideatrain
  def ideatrain
	  Post.find(params[:id]).ideatrains.create(params[:ideatrain])
	  flash[:notice] = "Added your comment."
	  redirect_to :action => "show", :id => params[:id]
  end
  
end

#show.rhtml
<%= render :partial=>"form", :object => @ideatrain %>

<%= link_to ''Edit'', :action => ''edit'',
:id => @post %> |
<%= link_to ''Back'', :action => ''list''
%>

<h2>Threads</h2>
<% for ideatrain in @post.ideatrains %>
<i><%=ideatrain.thread_subject %></i><br>
<%= ideatrain.thread_body %>
<hr />
<% end %>

<% form_tag :action => "ideatrain", :id => @post %>
<%= text_area "ideatrain", "body" %><br/>
<%= submit_tag "Ideatrain!" %>
</form>

#Partial form
<%= error_messages_for ''post'' %>

<!--[form:post]-->
<p><label
for="post_subject">Subject</label><br/>
<%= text_field ''post'', ''subject'' 
%></p>

<p><label
for="post_poster">Poster</label><br/>
<%= text_field ''post'', ''poster'' 
%></p>

<p><label for="post_date">Date</label><br/>
<%= datetime_select ''post'', ''date'' 
%></p>

<p><label for="post_time_range">Time
range</label><br/>
<%= datetime_select ''post'', ''time_range'' 
%></p>

<p><label for="post_stage">Stage</label><br/>
<%= text_field ''post'', ''stage'' 
%></p>

<p><label for="post_votes">Votes</label><br/>
<%= text_field ''post'', ''votes'' 
%></p>
<!--[eoform:post]-->