WP-admin blank default pages

If i logged into my website i see only blank pages. Front web working, links creted with theme works – like theme option, slides erc. But default like pages, links, posts etc. not working. I trying resolve this problem all day, i read dozens of topics and nothing help ??

Iam working on WordPress 3.3.2.

i have tried:
1) Rename the plugins folder and try again. Nothing, just plugins doesn’t work.
2) Rename the themes folder and try make default template active. Nothing change in admin, front page was blank – don’t know why…but admin is some.
3) No blank lines in function.php, wp-admin.php and some another files.
4) put to .htaccess
DirectoryIndex index.html index.htm index.php – Nothing
and
php_value memory_limit 32M – Nothing
and
php_flag display_errors on – Nothing
and
Delete file .htaccess – Nothing
5) Enable debug – define(‘WP_DEBUG’, true); – Nothing show
6) Upload and replace wp-admin, wp-includes and files inside of root folder like ( index.php, wp-admin, wp-login, etc ) – Just WordPress want set new config data to database. But nothing change with blank pages in admin.
8) change index.php in plugins folder do index.html – Nothing
7) Speak with my hosting provider. Don’t know what happen, no error report.

Do you know what i doing bad? Can someone please help me?

Website: https://www.truhlarstviex.cz