Pagination inside Secondary Loop

Hello everyone!

I’m trying to get this pagination up and going inside a template file of my theme, but i can’t get why it’s not working. Here’s the page’s code:

<?php
/*
Template Name: Post Page
*/
?>
<?php get_header(); ?>

<section class="row" id="main">

    <?php if ( have_posts() ) : while( have_posts() ): the_post(); ?>        

        <?php if ( has_post_thumbnail() ) {?>

            <section class="row" id="banner">

                <div class="col-md-12 col-lg-12 hidden-xs" id="banner-container">

                    <?php the_post_thumbnail('full');?>

                </div>

            </section>

        <?php } ?>

        <section class="row" id="post-content">
            <?php
            $paged = ( get_query_var('paged') ) ? get_query_var('paged') : 1;
            $args = array(
                    'order' => 'DESC',
                    'showposts' => '5',
                    'paged' => $paged
                );
            ?>
            <?php $latest = new WP_Query($args); ?>

            <?php $count = 0; ?>

            <?php while( $latest->have_posts() ) : $latest->the_post(); ?>

            <?php $count++; ?>

            <?php
                if ($count % 2 == 0) {

                    ?> 

                        <div class="col-xs-12 col-sm-10 col-md-8 col-lg-8 col-sm-offset-1 col-md-offset-2 col-lg-offset-2" id="single-post">
                            <div class="col-xs-12 col-sm-6 col-md-5 col-lg-5" id="post-image">
                                <div class="col-xs-12 col-sm-12 col-md-10 col-lg-10col-md-offset-1 col-lg-offset-1">
                                    <?php the_post_thumbnail('medium'); ?>
                                </div>
                            </div>
                            <div class="col-xs-12 col-sm-6 col-md-6 col-lg-6" id="post-content">
                                <div class="col-xs-12 col-sm-12 col-md-12 col-lg-12" id="post-title">
                                    <?php the_title(); ?>
                                </div>
                                <div class="col-xs-12 col-sm-12 col-md-12 col-lg-12" id="post-text">
                                    <?php the_content(); ?>
                                </div>
                            </div>
                        </div>

                    <?

                } else {

                    ?> 

                        <div class="col-xs-12 col-sm-10 col-md-8 col-lg-8 col-sm-offset-1 col-md-offset-2 col-lg-offset-2" id="single-post">
                            <div class="col-xs-12 col-sm-6 col-md-6 col-lg-6" id="post-content">
                                <div class="col-xs-12 col-sm-12 col-md-12 col-lg-12" id="post-title">
                                    <?php the_title(); ?>
                                </div>
                                <div class="col-xs-12 col-sm-12 col-md-12 col-lg-12" id="post-text">
                                    <?php the_content(); ?>
                                </div>
                            </div>
                            <div class="col-xs-12 col-sm-6 col-md-5 col-lg-5" id="post-image">
                                <div class="col-xs-12 col-sm-12 col-md-10 col-lg-10col-md-offset-1 col-lg-offset-1">
                                    <?php the_post_thumbnail('medium'); ?>
                                </div>
                            </div>
                        </div>

                    <?php

                }

            ?>

            <?php endwhile; ?>

                <div class="col-xs-12 col-sm-12 col-md-12 col-lg-12" id="paginaton-container">
                    <div class="nav-previous alignleft"><?php next_posts_link( 'Older posts' ); ?></div>
                    <div class="nav-next alignright"><?php previous_posts_link( 'Newer posts' ); ?></div>
                </div>

        </section>

    <?php endwhile; else:?>

    <?php endif;?>

</section>

<?php get_sidebar(); ?>

<?php get_footer(); ?>

Any ideas?