Warning: require(includes/application_top.php) [function.require]: failed to open stream: Invalid argument in D:\AppServ\www\serica\index.php on line 13

Fatal error: require() [function.require]: Failed opening required 'includes/application_top.php' (include_path='.;C:\php5\pear') in D:\AppServ\www\serica\index.php on line 13