After install - all pages are empty

Hi, all.
after install FreePBX a have a problems:

In Flash Operator Panel (FOP) (…panel/) i have "Couldn’t load variables.txt?aldope=16375"
In Voicemail & Recordings (ARI) (…recordings) - blank page
In FreePBX Administration (…admin/config.php) - blank page

NO errors.

PHP Version 5.3.8