post navigation not working with custom loop

http://codex.wordpress.org/Function_Reference/query_posts#Pagination_Parameters

Pagination Parameters

• nopaging=true – will disable pagination, displaying all posts
• posts_per_page=10 – number of posts to show per page
• paged=2 – show the posts that would normally show up just on page 2 when using the “Older Entries” link. You should set this to get_query_var( ‘paged’ ) if you want your query to work with pagination.
• order=ASC – show posts in chronological order, DESC to show in reverse order (the default)

did you put the previous and next link inside the custom query??

Because you have too…

<?php
    $myloops = new Wp_query();
    if($myloops->have_posts()){
        while($myloops->have_posts(){
            $myloops->the_post();
        }
    posts_nav_link();
    }
?>