I made some experiments. The problem solved.
You may see results
here.
Now how to do it:
1. Using a FTP program go to your folder where WP is installed.
2. Find the file "wp-config.php"
3. CHMOD to 777
4. Upload this file to your computer
5. Make a backup of the file just in case
6. Open the file and change charset to "windows-1251"
LIKE THIS:
<?php
// ** MySQL settings ** //
define('DB_NAME', 'a5530655_wpess9'); // The name of the database
define('DB_USER', 'a5530655_wpess9'); // Your MySQL username
define('DB_PASSWORD', '7IyHHgbNWSNw'); // ...and password
define('DB_HOST', 'mysql1.000webhost.com'); // 99% chance you won't need to change this value
define('DB_CHARSET', 'utf-8');
define('DB_COLLATE', '');
TO:
<?php
// ** MySQL settings ** //
define('DB_NAME', 'a5530655_wpess9'); // The name of the database
define('DB_USER', 'a5530655_wpess9'); // Your MySQL username
define('DB_PASSWORD', '7IyHHgbNWSNw'); // ...and password
define('DB_HOST', 'mysql1.000webhost.com'); // 99% chance you won't need to change this value
define('DB_CHARSET', 'windows-1251');
define('DB_COLLATE', '');
7. Save the file and upload back to the web folder overwriting the existed file
8. Open WP admin, go to Settings in upper right corner and change the header to whatever you wish
9. Come back to FTP and CHMOD wp-config.php back to the value it was before first change - this is for your security.
Let me know if it worked for you.