[Plugin: WP-PageNavi] Doesn't work

on my second page link. I got this ??

This is somewhat embarrassing, isn’t it?
It seems we can’t find what you’re looking for. Perhaps searching, or one of the links below, can help.

my code:

$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
 $custom_query = new WP_Query( array('posts_per_page' => 2, 'order' => 'DESC', 'paged'=> $paged) );
 while( $custom_query->have_posts() ) : $custom_query->the_post();

   //MY POSTS

 endwhile;
 /***Pagination***/
 if(function_exists('wp_pagenavi')) {
   wp_pagenavi(array( 'type' => 'multipart', 'query' => $custom_query ));
 }
 wp_reset_postdata();

whereas first page rocks and cannot recognize second and so on pages

PROBLEM RESOLVED!!

IN Admin:
Setting->Reading:
I set the “Blog pages show at most” to the minimum