Warning: require_once(PEAR/Registry.php) [function.require-once]: failed to open stream: No such file or directory in C:\ms4w\apps\chameleon\htdocs\common\installer\client\common.php on line 30

Fatal error: require_once() [function.require]: Failed opening required 'PEAR/Registry.php' (include_path='.;\ms4w\Apache\php\PEAR') in C:\ms4w\apps\chameleon\htdocs\common\installer\client\common.php on line 30