pagination

my pagination of custom page is not working properly: when i click on number of page it take this type of url: https://couponshq.com.au/blog/page/2/
and page have showing ” ERROR 404 – PAGE NOT FOUND ”

my code is:

<?php
	global $wp_query;
	                if (!$paged) {
	                    $paged = 1;
	                }
	                $pagenum = $paged;
	                $per_page = 3;

query_posts(array('post_type' => 'nme_blog', 'posts_per_page' => $per_page, 'paged' => $paged));

	if (have_posts ()) : while (have_posts ()) : the_post();
                        $post_id = get_the_ID();
                        $post_image_id = get_post_thumbnail_id($post_id);
                        $nme_content = get_the_content($post_id);
                        $cat = array();
                        foreach ((get_the_category()) as $category) {
                            $cat[] = $category;
                        }

                        if ($post_image_id) {
                            $thumbnail = wp_get_attachment_image_src($post_image_id, array(150, 100), false);

                            if ($thumbnail) {
                                (string) $thumbnail = $thumbnail[0];
                                $image_src = $thumbnail;
                            }
                        }
?>

<div class="blog-post">
	<div class="list-product">

    	<div class="list-product-img"><a>"><img src="<?php echo $image_src ?>" /></a></div>
    	<div class="post-data">
	    	<div class="list-product-title">
	        	<h2><a>"><?php the_title(); ?></a></h2>
	    	</div>

	        <div class="metadata">

<ul>
			        <li class="date"><time datetime="<?php the_time('c'); ?>" pubdate><?php the_time('F jS, Y'); ?></time>
			        <li class="author"><?php the_author() ?>
			        <li class="category"><?php the_category(', ') ?>
			        <li class="comments"><?php comments_popup_link(__('No Comments', 'eneaa'), __('1 Comment', 'eneaa'), __('% Comments', 'eneaa')); ?>
			    </ul>
	    		<div class="clear"></div>
			</div><!-- /metadata -->

  			<div class="list-product-content">
				<?php the_excerpt(); ?>
       				<div class="read-more"><a>"> Read More</a></div>
            </div>

		    <div class="social-icons" style="display:none;">
		        <div class="addthis_toolbox addthis_default_style addthis_32x32_style">
		        	<a></a>
		        	<a></a>
		        	<a></a>
		    	</div>
		    </div>
		</div>
    </div>
</div>

<?php
    endwhile;
 endif;?>

<!-- pagination section -->
<div class="nme-blog-page-navi">
  <?php
    if(function_exists('wp_pagenavi')){
        wp_pagenavi();
    }else{
        $page_links = paginate_links(array(
								            'base' => add_query_arg('paged', '%#%'),
								            'format' => '',

								            'prev_text' => __('?'),
								            'next_text' => __('?'),
								            'total' => $wp_query->max_num_pages,
								            'current' => $pagenum

								                ));
	echo $page_links;

    }

  ?> 

</div>

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anyone help me ? Thanks