Warning: require_once(PEAR.php) [function.require-once]: failed to open stream: No such file or directory in /pear/Benchmark/Timer.php on line 25

Fatal error: require_once() [function.require]: Failed opening required 'PEAR.php' (include_path='.:/:/usr/local/php/pear5:/pear:/lib') in /pear/Benchmark/Timer.php on line 25