Plus/Minus Button Not Showing In Archive Page

Hi,

I am using
Wordpress : 4.0
Woocommerce : 2.2.8

i am listing all product in home page. in there its showing qty box with plus/minus button. but in Archive page. only qty box is showing. i am using only single template to display.

i dont know where is the issue.

quantity-input.php

<?php
/**
 * Product quantity inputs
 *
 * @author 		WooThemes
 * @package 	WooCommerce/Templates
 * @version     2.1.0
 */

if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly
?>
<div class="quantity">
	<input type="number" step="<?php echo esc_attr( $step ); ?>"
		   <?php if ( is_numeric( $min_value ) ) : ?>
		   		min="<?php echo esc_attr( $min_value ); ?>"
		   <?php endif; ?>

		   <?php if ( is_numeric( $max_value ) ) : ?>
		   		max="<?php echo esc_attr( $max_value ); ?>"
		   <?php endif; ?> 

		   name="<?php echo esc_attr( $input_name ); ?>"
		   value="<?php echo esc_attr( $input_value ); ?>"
		   title="<?php _ex( 'Qty', 'Product quantity input tooltip', 'woocommerce' ) ?>"
		   class="input-text qty text"
		   size="4"
		   />
</div>

Qty Code

<?php
$addtocart = '';
$backorders = $product->backorders_allowed() ? '' : $product->get_stock_quantity();

if ( ! $product->is_purchasable() ) return;

if ( $product->is_in_stock() ) :

	if($product->is_type( 'simple' )){
		if ( ! $product->is_sold_individually() ){
			$qty_box = woocommerce_quantity_input(array(
				'min_value' => apply_filters( 'woocommerce_quantity_input_min',1, $product ),
				'max_value' => apply_filters( 'woocommerce_quantity_input_max',$backorders, $product )
			),'',false);
		}

		$addtocart = '
			<form class="cart" method="post" enctype="multipart/form-data"> '.$qty_box.'
				<input type="hidden" name="add-to-cart" value="'.esc_attr( $product->id ).'" />
				<button type="submit" class="single_add_to_cart_button button alt">'.$product->single_add_to_cart_text().'</button>
			</form>
		';
	}
endif; 

echo $qty_box;
?>

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