Do you have a link?
Sounds like you didn’t set up the plugin after you installed it. Frekel is pretty good about following up with his plugin but posting a link to the error might get it resolved quicker.
Yep, need an url 😉
But it sounds like a customization error:
snippet from the read me file:
Customization
The plugin provides a config entry in wp-photocontest-config.php file to skins the pages created by WP-PhotoContest. This entry points to a directory underneath the 'skins' directory. This directory must contain the following files:
* template.tpl : This file is used as template for the pages created by WP-PhotoContest (*)
* theme.css : This stylesheet is used for styling the pages created by WP-PhotoContest
To create a new skin, you can copy the aqua directory in the directory 'skins' into and other directory and edit as aproperiate. Then change the 'CONTESTS_SKIN' contant in wp-photocontest-config.php file.
(*) Important: When using a theme, you need to copy page.php or index.php to template.tpl and replace "The_Loop" with [WP-PHOTOCONTEST CONTENT]. See for more information: 'http://codex.wordpress.org/The_Loop'
There needs to be a class called 'content_wppc'. The contest will be placed in the HTML-tag with this class.