blank page on starting a wiki

I have installed mediawiki on 3 opensuse11.2 machines and encountered the same problem on each, now the same happened with wackowiki:
installation of the wiki runs o.k., on calling the url in the browser, it shows a blank page. After inserting into LocalSetting.php the lines:
error_reporting( E_All );
ini_set( ‘display_errors’,1);

the wiki came up with:

Warning: Parameter 2 to Parser::parse() expected to be a reference, value given in /srv/www/htdocs/mwiki/includes/StubObject.php on line 58 Fatal error: Call to a member function getCacheTime() on a non-object in /srv/www/htdocs/mwiki/includes/Article.php on line 3387

could you help me with what I did wrong ?
Thanks!
Heinrich