[Zope] Help!

[Victor Zhai]

I setup a Poll  class in My product directory.
And put some source in it...

***********My Class Poll is:
class Poll:




***********My Dtml  script is:


<!--#var standard_html_header-->
<h2><!--#var title_or_id--></h2>
<p>
This is the <!--#var id--> Document.
</p>
<p><!--#var question--></p>
<form action="<!--#var id-->/vote" method="post">
<!--#in choices-->
<input type="radio" name="choice:int" value="<!--#var sequence-index-->"> <!--#var sequence-item--><br>
<!--#/in-->
<!--#if action-->
<input type="hidden" name="action" value="<!--#var action-->">
<!--#/if-->
<input type="submit" value="Vote">
</form>

<!--#var standard_html_footer-->

***But when run this script in My web browser.It provider the following errors:



Zope has encountered an error while publishing this resource. 

           Error Type: KeyError
           Error Value: question



           Troubleshooting Suggestions

                This resource may be trying to reference a nonexistent object or variable question. 
                The URL may be incorrect. 
                The parameters passed to this resource may be incorrect. 
                A resource that this resource relies on may be encountering an error.