showing especial category of posts

HI all
in my wordpress theme (monaco) there is a slider that shows all pictures summery of main posts (main page).
how can I show info of especial category in slider?
the code for summery of the post is:

<?php 	$count = of_get_option('w2f_slide_number');
				$slidecat =of_get_option('w2f_slide_categories');
				$query = new WP_Query( array( 'cat' =>$slidecat,'posts_per_page' =>$count ) );
	           	if ($query->have_posts()) : while ($query->have_posts()) : $query->the_post();	?>