fedora cacri XAMPP "adodb.inc.php" problem

[atrin]

HI there
actually i use XAMPP for installing php and mysql
after installation is finish all the things work well and i can config cacti but there is a problem when in want to view the graphs its show me the error :

Only variable references should be returned by reference in /opt/lampp/htdocs/cacti/lib/adodb/adodb.inc.php on line 866

i check all the configurations and all of that is ok

OS: Fedora 9
Cacti : 0.8.6b