Warning: require_once(PEAR.php) [function.require-once]: failed to open stream: Permission denied in C:\wamp\bin\php\php5.2.6\PEAR\DB\DataObject.php on line 91

Fatal error: require_once() [function.require]: Failed opening required 'PEAR.php' (include_path='.;C:\wamp\bin\php\php5.2.6\;C:\wamp\bin\php\php5.2.6\PEAR') in C:\wamp\bin\php\php5.2.6\PEAR\DB\DataObject.php on line 91