ERROR 500 after setup

[retizotyo]

Is apache the webserver or other one ?
Try to rename temporarily .htaccesss file and see if it starts working

btw. /data directory and its nested dirs have to have 755 access rights, otherwise GS won't be able to save data.

It's a Windows server 2008 (I know it's not the best)
I asked the server administrator and he said I have full permissions to the folders (see img in my post above).
I tried to rename, remove .htaccess, but nothing happens.