wp pagenavi error

If you have a query on your loop you have to use wp-pagenavi this way:
http://scribu.net/wordpress/wp-pagenavi/wpn-2-74.html

Can you paste and submit the full code of the template with wp-pagenavi into a pastebin.com and post the link to it here? see the Forum Rules for posting code and using the pastebin.

Try it with this: http://pastebin.com/L1hJrTzJ

is this on a static front page?

it goes to archive page,url is http://MYSITE.com/2012/

Sorry for all the questions, but is the pagination not working on your home page or on an archive page?

Can we have a link to your site to see what is going on?

Try it without the query post in the template file: http://pastebin.com/hyfy9Mps

and with this in your theme’s functions.php:

function my_archive_query( $query ) {
  // not an admin page and is the main query
  if (!is_admin() && $query->is_main_query()){
    if(is_archive() && is_year()){
      $query->set('posts_per_page', 20);
    }
  }
}
add_action( 'pre_get_posts', 'my_archive_query' );