[Plugin: Special Recent Posts] Error when inserting into template

Warning: array_merge() [function.array-merge]: Argument #1 is not an array in C:\Programme\xampp\htdocs\null-papier.de\wp-content\plugins\special-recent-posts\classes\class-main.php on line 53

when using this:

if(function_exists(‘special_recent_posts’)) {
// Defining widget options.
$args = array(
‘srp_number_post_option’ => 5,
‘srp_orderby_post_option’ => ‘rand’,
‘srp_thumbnail_option’ => ‘no’
);

// Function call.
special_recent_posts($args);
}

http://ww.wp.xz.cn/extend/plugins/special-recent-posts/