URGENT-how 2 install smokepinglike/advenced ping in 0.86H

[ixtab]

hi everyone.

i've treid to install smokepinglike or advenced ping in cacti 0.86h, but.
when i installed smokepinglike and ping-latency.pl, this graph doesn't apper, i mean, in my smokepinglike graph i got nan values...but when i run perl /.../ping-latency.pl i got the correct values. and......
when i tried to install advenced ping. i copy the file ss_fping and ping.php, and import my graph..when a refresh my graph all my graphs got nan values, and nothing works.

can anybody help me??, i'm a student wita big trouble...

this is my system
cacti-0.86h
mysql-4.1.20
perl-5.8.5
php-4.3.9-3
rrdtool-1.2.15-1