Hi Admin,
a very important notice i’ve forget to tell you is that i have that problem since the “500 Internal Server Error”.
Here is the link: http://forum.ait-pro.com/forums/topic/500-server-error/
Perhaps it could be a problem for this?!
I did the creation of a new fw .htaccess file you described above – i will see and tell you if the log shows the entries.
nukleuz
PS: Do i have to clean the custom code?
AND perhaps the PHP Error i get since the 500 Error could be a prob too?
[05-Nov-2014 08:00:09] PHP Warning: copy(/var/www/vhosts/xyz.de/httpdocs/wp-content/languages/continents-cities-de_DE.mo): failed to open stream: Permission denied in /var/www/vhosts/xyz.de/httpdocs/wp-admin/includes/class-wp-filesystem-direct.php on line 217