[Zope] index_html method in a zclass

[sture@rocketrange.no]

Hi!

Hope someone can help me out here.

I've just created a simple zclass that contains an index_html method. I've also
created a test instance of the class. I tought calling the instance using
'<!--#var instancename-->' from a dtml method or document would render the 
class' index_html method, but I get no output. 

The only way I can display the instance' index_html is by dooing:
'<!--#with instancename--><!--#var index_html--><!--#/with-->' 

Am I doing something wrong, or is the first method described in here not
possible?

Thanks in advance

Sture Lygren