empty document in dokuwiki

[habdankm]

Hi
I'v installed dokuwiki with owncloud using:
CentOS release 6.5 (Final)
dokuwiki 2013-12-08 "Binky"
owncloud 5.0.15
php-5.3.3-27.el6_5.x86_64
postgresql-8.4.20-1.el6_5.x86_64

After I'v installed owncloud plugin in dokuwiki and dokuwiki plugin in owncloud and now all my documents show empty page (header is displayed correctly). I was trying to find any clue, but I wasn't able to force php to log anything.
my php.ini contain:
error_reporting = E_ALL & ~E_DEPRECATED
display_errors = On
display_startup_errors = On
log_errors = On
error_log = /var/log/php_errors.log
and php report errors in other sites correctly

My owncloud plugin in dokuwiki shows (button info)
Plugin: owncloud

Source:
https://github.com/rotdrop/dokuwiki-owncloud/archive/master.zip
Installed:
Sat, 01 Jun 2013 14:20:26 +0200
Last updated:
Tue, 19 Nov 2013 09:54:40 +0000

and my owncloud plugin configuration is:
[Admin]->Configuration Settings
Owncloud:
Path to ownCloud-files: /var/www/owncloud
URL of the ownCloud-instance: http://oc_itshare_localhost (it is virtualhost, I'm able to see owncloud login page here)
Link authors in filelist and history (authorlist-plugin required)? -

In dokuwiki I'v enabled degug mode ("allowdebug") but still do not have any error messages. Just empty document.

Please, could you help me to find a problem?

Regards

Mikolaj Habdank