Possible solutions of your questions

Hello.

Check the error log: error_log

[11-Mar-2014 07:56:09] PHP Fatal error: require() [<a href=`function.require`>function.require</a>]: Failed opening required `/home/vereskov/public_html/wp-includes/load.php` (include_path=`.:/opt/alt/php52/usr/share/pear:/opt/alt/php52/usr/share/php`) in /home/vereskov/public_html/wp-settings.php on line 21

you Have missing file: /home/vereskov/public_html/wp-includes/load.php

Download new file. Follow the steps:

http://ded07.net/faq/wp/             - installation of WP
http://ded07.net/faq/wp-supercashe/    - install the plugin caching