error generating rrd files

[Amorphous]

heloo i m new in this forum, i know there has been topics about this error generating rrd file in rra/ but i didnt understood enything from there, or the problems were solved but there wasnt the solution posted ....

as i was saying, i installed a fresh new cacti version 0.8.7e

i followed a tutorial for Centos because i am using Centos 5.3 and after everything is installed, i get:

RRDTool Says:

ERROR: opening '/usr/local/cacti/rra/zyxell_-_2024_pwr_traffic_in_8.rrd': No such file or directory



the settings:

cd /../usr/local/cacti
chown -R cactiuser rra/ log/
chgrp apache log/cacti.log
chmod g+w log/cacti.log

su cactiuser
crontab -e

*/5 * * * * cactiuser /usr/bin/php /usr/local/cacti/poller.php > /dev/null 2>&1



using:
rrdtool-1.3.8
net-snmp-5.2.4
cacti-0.8.7e
patch cacti-plugin-0.8.7e-PA-v2.5.diff

mysql and php default from centos installation, including the required libraries.


what is wrong ?? why i still have this issues from rrdtool creating those files???

Data Source Debug

/usr/local/bin/rrdtool create \
/usr/local/cacti/rra/zyxell_-_2024_pwr_traffic_in_8.rrd \
--step 300 \
DS:traffic_in:COUNTER:600:0:100000000 \
DS:traffic_out:COUNTER:600:0:100000000 \
RRA:AVERAGE:0.5:1:600 \
RRA:AVERAGE:0.5:6:700 \
RRA:AVERAGE:0.5:24:775 \
RRA:AVERAGE:0.5:288:797 \
RRA:MAX:0.5:1:600 \
RRA:MAX:0.5:6:700 \
RRA:MAX:0.5:24:775 \
RRA:MAX:0.5:288:797 \

RRDTool Command:

/usr/local/bin/rrdtool graph - \
--imgformat=PNG \
--start=-86400 \
--end=-300 \
--title="Zyxell - 2024 PWR - Traffic - swp00" \
--rigid \
--base=1000 \
--height=120 \
--width=500 \
--alt-autoscale-max \
--lower-limit=0 \
--vertical-label="bytes per second" \
--slope-mode \
--font TITLE:12: \
--font AXIS:8: \
--font LEGEND:10: \
--font UNIT:8: \
DEF:a="/usr/local/cacti/rra/zyxell_-_2024_pwr_traffic_in_8.rrd":traffic_in:AVERAGE \
DEF:b="/usr/local/cacti/rra/zyxell_-_2024_pwr_traffic_in_8.rrd":traffic_out:AVERAGE \
AREA:a#00CF00FF:"Inbound" \
GPRINTLAST:" Current\:%8.2lf %s" \
GPRINTAVERAGE:"Average\:%8.2lf %s" \
GPRINTMAX:"Maximum\:%8.2lf %s\n" \
LINE1:b#002A97FF:"Outbound" \
GPRINTLAST:"Current\:%8.2lf %s" \
GPRINTAVERAGE:"Average\:%8.2lf %s" \
GPRINTMAX:"Maximum\:%8.2lf %s\n"

RRDTool Says:

ERROR: opening '/usr/local/cacti/rra/zyxell_-_2024_pwr_traffic_in_8.rrd': No such file or directory

drwxr-xr-x 2 cactiuser root 4096 Aug 29 10:39 log
drwxr-xr-x 2 cactiuser root 4096 Aug 29 10:39 rra


also attached the settings for the device

trust me i m allready desperate, this is the third server i m trying to install, everytime the same problem.
if u can help me, please also tell me commands i need to make, in order to show u anymore settings in the server, i m not that good in linux

thanks in advance !