Warning: main() [function.main]: Unable to access //includes/defines.php in index.php on line 21

Warning: main(//includes/defines.php) [function.main]: failed to open stream: No such file or directory in index.php on line 21

Fatal error: main() [function.require]: Failed opening required '//includes/defines.php' (include_path='.:/include/') in index.php on line 21