我新设置了wordpress，并使用以下代码在主页中添加上一个分页

next_posts_link(\'Older Entries »\', 0);
previous_posts_link(\'« Newer Entries\', 0);

分页URL工作正常。单击上一个链接时，它会转到http:www.mydomain。com/blog/page/2/URL，但未加载内容。它显示相同的第一页博客文章列表。我有70篇博文，每页显示4篇博文。如何在分页URL中加载帖子？我需要做点什么吗。htaccess或WP设置更改？

$args = array(\'numberposts\' => 4);
$lastposts = get_posts( $args );
foreach($lastposts as $post) : setup_postdata($post); 
$a = get_post_custom();
    $blogroll_image = $a[\'mainImage\'];
    print(\'
    <section class="main_post bg_white fl">
        <section class="post_img fl">\');
    print(\'<a href="\' . get_permalink() . \'"><img src="\'.$blogroll_image[0].\'" width="385" height="385" alt=""/></a>\'); 
    print(\'</section>
        <section class="post_content fl col_light_blue">
        <p>\' . get_the_date() .\' </p>\');
        the_title(\'<a href="\' . get_permalink() . \'"><h1 class="col_light_blue">\', \'</h1></a>\'); 
    print(the_excerpt(\'<p>\', \'</p>\'));
    print(\'</section>   
    <!-- end .main_post -->
    </section>
    <div class="spacer_1px"></div>\');   
endforeach;
        next_posts_link(\'Older Entries »\', 0);
        previous_posts_link(\'« Newer Entries\', 0);