I installed cacti-plugin-0.8.7g-PA-v2.9.tar.gz on debian 6.
I followed the procedure as the cacti documentation.
I used the pre-patched files method.
also i changed the following into config.php and global.php as the following:
/Line 105 *$config['url_path'] = $url_path;*/
$config["url_path"] = '/cacti/';
/* Line 112 $config["rra_path"] = $config["base_path"] . '/rra';*/
$config["rra_path"] = '/var/lib/cacti/rra';
include("/usr/share/php/adodb/adodb.inc.php");
I can open the cacti web but the graphs are not opening

I checked the cacti log file, no error at all everything seems normal:
06/18/2014 03:29:19 PM - SYSTEM STATS: Time:17.6475 Method:spine Processes:1 Threads:10 Hosts:32 HostsPerProcess:32 DataSources:5491 RRDsProcessed:1135
however the apache2/error.log shows me this:
ERROR: opening '/usr/share/cacti/site/var/lib/cacti/rra/localhost_proc_7.rrd': No such file or directory
I don't know what it is showing this long path to access the rrd files.
Can someone advise what should i modify and which file?
cacti config file is in /usr/share/cacti/site
rrd files in /var/lib/cacti/rra
Regards
Berny