Default controller not working

[eluser]wallern[/eluser]
Thanks aquary,

I checked error logs in both apache and CI, no error shows when I get the blank page. But the error logs are working, I mean if I deliberately put some wrong code in index.php or config.php or database.php, errors will get booked in the logs. To me it looks like the default controller is not loading.

I also have a back end CMS of this site running ok locally, and site itself is working fine on production server, just dosen't show up in my localhost.