Gravatar does not work in the online module

        if (count(explode("@", $row['foto'])) == 2) {
            $tpl->set('{gravatar}', $row['foto']);
            
            $tpl->set('{foto}', '//www.gravatar.com/avatar/' . md5(trim($row['foto'])) . '?s=' . intval($user_group[$row['user_group']]['max_foto']));
            
        } else 
		{
		
        if ( $this->user_foto && file_exists( ROOT_DIR."uploads/fotos/".$this->user_foto ) )
        {
            $foto = $this->config['http_home_url']."uploads/fotos/".$this->user_foto;
        }
		elseif ( $this->user_foto )
        {
            $foto = $this->user_foto;
        }
        else
        {
            $foto = $this->config['http_home_url']."templates/".$this->config['skin']."/images/noavatar.png";
        }
	}