Objects made from custom classes don't appear on "2 items block" on ezflow.

Steps:

• Create a costum class (i used a copy of "Article" class)
• Create an object from that custom class
• Add a "2 items block" to ezflow front end
• On the "2 items block", add the created object
• Publish

In debug output, i have the following warning:
{noformat]
Warning: eZTemplate Sep 16 2013 10:56:58
No template could be loaded for "extension/ezflow/design/ezflow/override/templates/node/view/block_item.tpl" using resource ""
{noformat]

I have no errors in errors.log or apache logs.

NOTE: if instead of a custom class, i create an object using an already existing class ("Article", for instance), the object appears on the block.

Test executed with Build #814 of ezpublish5-ee-bul-tarballs. Used ezflow packages fectched from ci.ez.no.