GroupDiscount : fatal error

[scareface]

Hello

 

I've installed groupdiscount and now when I add a product to my cart and try to see it

I've this fatal error :

 

Fatal error: Call to undefined function: display_price_nodiscount() in /***/*****/shopping_cart.php on line 150

 

arround lines 150 in my shopping_cart.php :

 

	 //GroupDiscount start
  $info_box_contents[$cur_row][] = array('align' => 'right',
										 'params' => 'class="productListing-data" valign="top"',
										 'text' => '<b>' . $currencies->display_price_nodiscount($products[$i]['final_price'], tep_get_tax_rate($products[$i]['tax_class_id']), $products[$i]['quantity']) . '</b>');
  //GroupDiscount end

 

how can I repair this please ?

[scareface]

nobody can't help me please ? :'(