[pmwiki-users] pmwiki - displays only white page

[Patrick Ogay]

Hello,

I just installed a pmwiki  and it's not the first time I installed a 
pmwiki:-)
svn checkout svn://pmwiki.org/pmwiki/tags/latest pmwiki_svn

pmwiki.php  just displays a blank page:
http://80.74.143.185/tools/pmwiki/pmwiki.php 
I change root:root to  www-data:www-data
http://80.74.143.185/tools/pmwiki_svn/pmwiki.php         second 
installation  (displays also blank)

*PHP-Version+other tests
PHP Version 5.0.5-Debian-0.8~sarge1
http://80.74.143.185/tools/pmwiki/phpinfo.php
http://80.74.143.185/tools/spip/spip.php?article31  (php works)

I assigned a php.log and checked the apache log, too.
cat /var/log/php.log  
tail -f /var/log/apache2/error.log
no related error messages

May be anybody can give me a hint,
at least to get an error-message.

Regards
Patrick O.