Warning: require_once(dade.php) [function.require-once]: failed to open stream: No such file or directory in D:\phpStudy\WWW\tags.php on line 2

Fatal error: require_once() [function.require]: Failed opening required 'dade.php' (include_path='.;C:\php\pear') in D:\phpStudy\WWW\tags.php on line 2