PHP error ! how to resolve? : 

Warning: require_once(C:\xampp\htdocs\phonoblog\system\core): failed to open stream: Permission denied in C:\xampp\htdocs\phonoblog\system\core\CodeIgniter.php on line 80

Fatal error: require_once(): Failed opening required 'C:\xampp\htdocs\phonoblog\system\core/' (include_path='C:\xampp\php\PEAR') in C:\xampp\htdocs\phonoblog\system\core\CodeIgniter.php on line 80