Warning: require(APP_ROOTpublic/top.php): failed to open stream: No such file or directory in D:\AppServ\www\Index\Tpl\order\pay.php on line 4

Fatal error: require(): Failed opening required 'APP_ROOTpublic/top.php' (include_path='.;C:\php\pear') in D:\AppServ\www\Index\Tpl\order\pay.php on line 4