I think i solved the problem by increasing PHP limit. You have to add to your .htaccess file this piece of code and everything will run smooth:
<IfModule mod_php5.c>
php_value suhosin.simulation 1
php_value suhosin.post.max_vars 6000
php_value suhosin.get.max_vars 6000
php_value suhosin.request.max_vars 6000
</IfModule>
🙂