popularity-contest 1.3b2

when i activate the plugin i get this:

Plugin could not be activated because it triggered a fatal error.

is this plugin in wordpress code all ready?

this is my code:

<?php if (function_exists('akpc_most_popular')) { akpc_most_popular($limit = 10); } ?>

and i get nothing
no error if i use only:

akpc_most_popular($limit = 10);