Class 'iterator' not found in /usr/local/www/data-dist/cacti

[eylon]

hi
i run cacti on freebsd
when i want to see the inex.php
iget the following maesseg

Fatal error: Class 'iterator' not found in /usr/local/www/data-dist/cacti/cacti-0.8.5/lib/adodb/adodb-iterator.inc.php on line 19


what i did worng ??