// html formatting

      $file_tpl = "modules/$ModName/templates/$nl_tpl_html";

      if(phpversion() == '4.2.3') {
            $message = file($file_tpl);
            $message = implode("", $message);
        } else {
            $open_tpl = fopen($file_tpl, "rb");
            $message = fread($open_tpl, filesize($file_tpl));
            fclose($open_tpl);
        }

      $message = str_replace ("<!-- [DATE] -->", "$display_date", $message);
      $message = str_replace ("<!-- [ISSUE] -->", "$nl_issue", $message);
      $message = str_replace ("<!-- [HEADER] -->", "$nl_header", $message);
      $message = str_replace ("<!-- [FOOTER] -->", "$nl_footer", $message);

      $news = '';

      $modsql = "SELECT mod_file, mod_function, mod_multi_output, mod_qty, mod_id FROM $prefix"._nl_modules." ORDER BY mod_pos";
        $result = $dbconn->Execute($modsql);
      if ($dbconn->ErrorNo() != 0) {
            echo _DBREADERROR;
      }
      while(!$result->EOF) {
            list($mod_file, $mod_function, $mod_multi_output, $mod_qty, $mod_id) = $result->fields;
                $result->MoveNext();
            if($mod_multi_output == 1 AND $mod_qty == 0) {
              } else {
                  include_once("modules/$ModName/modules/$mod_file.php");
==> Error is here line 498 ===>   $mod_function = "$mod_function"._html."";    <=== Error
                  $news .= $mod_function($mod_id, $nl_url, $ModName);
              }
        }

      $message = str_replace ("<!-- [NEWS] -->", "$news", $message);