Function get_hearder()

Bom eu estou com o seguinte error em meu site, quem puder me ajudar ficarei grato meu error é o seguinte. (Fatal error: Call to undefined function get_header() in C:\xampp\htdocs\Phenomenon2\index.php on line 1)

Meu index.php

> <?php get_header(); ?><!-- slider-holder START here -->

 <div id="slider-holder">

 <div id="slider-nav-container">

 <div id="slider-nav"></div>

 <img src="<?php bloginfo('template_directory'); ?>/images/slider-nav-right.png" alt="" style="float:left;" /> </div>

 <div id="slider">

 <?php

 $slider_cat = get_option('pheno_slider_cat');

 $slider_items = get_option('pheno_slider_items');

 $Timthumb = get_option('pheno_timthumb');

 $args=array(

 'posts_per_page' => $slider_items,

 'category_name' => $slider_cat,

 );

 query_posts($args);

 ?>

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

 <div class="slide">

 <div class="inside">

 <?php

 $has_image = get_post_meta($post->ID, "post_image_value", $single = true);

 if ($has_image != '') {

 ?>

 <?php if ($Timthumb == true) { ?>

 <img src="<?php bloginfo('template_directory'); ?>/scripts/timthumb.php?src=<?php echo $has_image; ?>&h=200&w=200&zc=1&q=100" alt="" class="slide-img" width="200" height="200" />

 <?php } else { ?>

 <img src="<?php echo $has_image; ?>" alt="" class="slide-img" width="200" height="200" />

 <?php } ?>

 <?php } ?>

 <h2><?php the_title(); ?></h2>

 <?php the_content(); ?>

 </div>

 </div>

 <?php endwhile; ?>

 </div>

 </div>

 <!-- slider-holder END here -->

 </div>

 <!-- container END here -->

 </header>

 

 <?php get_sidebar('pricing'); ?>

 

 <!-- content START here -->

 <div id="content">

 <!-- container START here -->

 <div class="container">

 <div id="home-colums">

 <!-- colum1 START here -->

 <div class="colum">

 <h3><?php echo stripslashes(get_option('pheno_bottom_left_title')); ?></h3>

 <?php echo do_shortcode(stripslashes(get_option('pheno_bottom_left_content'))); ?>

 </div>

 <!-- colum1 END here -->

 <!-- colum2 START here -->

 <div class="colum">

 <h3><?php echo stripslashes(get_option('pheno_bottom_middle_title')); ?></h3>

 <?php get_sidebar('services'); ?>

 </div>

 <!-- colum2 END here -->

 <!-- colum3 START here -->

 <div class="colum no-margin">

 <h3><?php echo stripslashes(get_option('pheno_bottom_right_title')); ?></h3>

 <?php echo do_shortcode(stripslashes(get_option('pheno_bottom_right_content'))); ?>

 </div>

 <!-- colum3 END here -->

 </div>

 </div>

 <!-- container END here -->

 </div>

 <!-- content END here -->

</div>

<!-- site-wrapper END here -->

<?php get_footer(); ?>