Wordpress tax_query and pagination issue - php

Question

I am creating a wordpress template to query my custom post type posts by using tax_query. It works fine and I get the correct posts in page #1, but I see the same posts as seen at page #1 when I click page #2. What did i missing here? Thanks in advance.
<?php
get_header();
?>
<h1><?php
the_title();
?></h1> <hr> <br>
<div id="content" class="three_fourth <?php
echo of_get_option('blog_sidebar_pos');
?>">
<?php
?>
<?php
$temp = $wp_query;
$wp_query = null;
$wp_query = new WP_Query();
$page = (get_query_var('paged')) ? get_query_var('paged') : 1;
$args = array(
'tax_query' => array(
array(
"taxonomy" => "wpdic-category",
"field" => "slug",
"terms" => "featured-charities",
"numberposts" => 5,
"paged" => $paged
)
)
);
$wp_query = new WP_Query($args);
?>
<?php
if ($wp_query->have_posts()):
while ($wp_query->have_posts()):
$wp_query->the_post();
?>
<article id="post-<?php
the_ID();
?>" <?php
post_class();
?>>
<header>
<h2><a href="<?php
the_permalink();
?>" title="<?php
the_title();
?>" rel="bookmark"><?php
the_title();
?></a></h2>
<?php
$post_meta = of_get_option('post_meta');
?>
<?php
if ($post_meta == 'true' || $post_meta == '')
{
?>
<div class="post-meta">
<div class="fleft"></div>
<div class="fright"></div>
</div><!--.post-meta-->
<?php
}
?>
</header>
<?php
$post_image_size = of_get_option('post_image_size');
?>
<?php
if ($post_image_size == '' || $post_image_size == 'normal')
{
?>
<?php
if (has_post_thumbnail())
{
echo '<a href="';
the_permalink();
echo '">';
echo '<div class="featured-thumbnail"><div class="img-wrap">';
the_post_thumbnail();
echo '</div></div>';
echo '</a>';
}
?>
<?php
}
else
{
?>
<?php
if (has_post_thumbnail())
{
echo '<a href="';
the_permalink();
echo '">';
echo '<div class="featured-thumbnail large"><div class="img-wrap"><div class="f-thumb-wrap">';
the_post_thumbnail('post-thumbnail-xl');
echo '</div></div></div>';
echo '</a>';
}
?>
<?php
}
?>
<div class="post-content">
<?php
$post_excerpt = of_get_option('post_excerpt');
?>
<?php
if ($post_excerpt == 'true' || $post_excerpt == '')
{
?>
<div class="excerpt"><?php
$excerpt = get_the_excerpt();
echo my_string_limit_words($excerpt, 52);
?></div>
<?php
}
?>
<div id="widget_my_contentwidget"><ul><li><a class="link" href="<?php
the_permalink();
?>"> read more</a></li></ul></div>
<hr>
</div>
</article>
<?php
endwhile;
else:
?>
<div class="no-results">
<p><strong>There has been an error.</strong></p>
<p>We apologize for any inconvenience, please <a href="<?php
bloginfo('url');
?>/" title="<?php
bloginfo('description');
?>">return to the home page</a> or use the search form below.</p>
<?php
get_search_form();
?> <!-- outputs the default Wordpress search form-->
</div><!--noResults-->
<?php
endif;
?>
<?php
if (function_exists('wp_pagenavi')):
?>
<?php
wp_pagenavi();
?>
<?php
else:
?>
<?php
if ($wp_query->max_num_pages > 1):
?>
<nav class="oldernewer">
<div class="older">
<?php
next_posts_link('« Older Entries');
?>
</div><!--.older-->
<div class="newer">
<?php
previous_posts_link('Newer Entries »');
?>
</div><!--.newer-->
</nav><!--.oldernewer-->
<?php
endif;
?>
<?php
endif;
?>
<!-- Page navigation -->
<?php
$wp_query = null;
$wp_query = $temp;
?>
<div id="footer">
<div class="clearfix">
<?php
if (!dynamic_sidebar('Footer Content')):
?>
<?php
endif;
?></div></div>
</div><!--#content-->
<?php
get_footer();
?>

Answer 1

wp_pagenavi() will work with the global $wp_query by default; if you want to paginate some custom query you need to pass it as a parameter, like:
wp_pagenavi( array( 'query' => $mycustomquery ) );

Answer 2

I have encountered the same problem before. For some reasons i cannot make WP query to work, but instead i used query_posts. Here is the code
<?php
/**
* #author MESMERiZE
* #copyright 2012
*/
$page = (get_query_var('paged')) ? get_query_var('paged') : 1;
$args = array(
'tax_query' => array(
array(
"taxonomy" => "wpdic-category",
"field" => "slug",
"terms" => "featured-charities",
"numberposts" => 5,
"paged" => $paged
)
)
);
query_posts($args);
while(have_posts()): the_post();
endwhile;
?>
Then i added the wp pagenavi function after the endwhile keyword.
if (function_exists('wp_pagenavi')) {
wp_pagenavi();}