[Plugin: PhotoContest Plugin] Make number of votes shown in image page

I want, that number of votes would be shown in single image page.

I copied line from view.php:
<span class="polaroid_votes"><?php printf(_n("%d vote", "%d votes", $page_row['sum_votes'], 'wp-photocontest'), $page_row['sum_votes']); ?></span>
and pasted it to viewimg.php.
But it didn’t sumed up, and showed zero votes.

Maybe I use bad variables?

Is there a possibility to do that?