Single template for Fundraising / fundraiser?

I have installed the Fundraising plugin and need to style each fundraiser with a specific template. However, I can't get WP to use the template file I create.

I have tried lots of variations (the slug is changed to 'cause' in the settings for the plugin):
single-cause.php
single-funder.php
single-fundraiser.php
single-fundraisers.php
(..and some others)

The What Template plugin says the page is using the single.php template. I have resaved permalinks, but without success, can't get WP to load the template I want. ;-(

Please help me figure out which template name to use. The page is http://aircraftstory.org/cause/aircraft-story/

Thanks!