At some point it worked just fine. After installing some plugins - the Add/Edit edit area (or simple the post itself) dissapeared (althou it's in the source). Everything is in the place except TinyMCE. I didn't change any CSS or so.
Advanced Custom Fields
Simple Facebook Connect
WPML Multilingual CMS
That happened after I installed one of these:
Wordpress SEO by Joost de Valk
Custom fields update
Tried to change to default theme and then back. Disable/Enable different configurations of plugins. But nothing helps.
Maybe I should clear something or what? Give me any clues guys, I'm hopeless at the point.