Warning: require(/wp-includes/wp-blog-header.php) [function.require]: failed to open stream: No such file or directory in /wp-includes/template-loader.php on line 1

Warning: require(/wp-includes/wp-blog-header.php) [function.require]: failed to open stream: No such file or directory in /wp-includes/template-loader.php on line 1

Fatal error: require() [function.require]: Failed opening required '/wp-includes/wp-blog-header.php' (include_path='.:/:/usr/local/php5/lib/pear') in /wp-includes/template-loader.php on line 1