After install cacti, graphs are not createable & display abl

[sulmanpakistan]

Dear All,
I need urgent help regarding cacti, that is i have installed cacti, then add device and create graph as well. but after to much try, no graph displayed by cacti. when i enable the Turn on Graph Debug mode then, result as
RRDTool Command:

/usr/bin/rrdtool graph - \
--imgformat=PNG \
--start=-86400 \
--end=-300 \
--title='Internet Router - Traffic' \
--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="/var/www/cherokee/cacti/rra/router_bw_utilization_load_5min_11.rrd":load_5min:AVERAGE \
AREA:a#00CF00FF:"Inbound" \
GPRINTLAST:" Current\:%8.2lf %s" \
GPRINTAVERAGE:"Average\:%8.2lf %s" \
GPRINTMAX:"Maximum\:%8.2lf %s\n" \
COMMENT:"Total In\: 0 bytes\n" \
LINE1:a#002A97FF:"Outbound" \
GPRINTLAST:"Current\:%8.2lf %s" \
GPRINTAVERAGE:"Average\:%8.2lf %s" \
GPRINTMAX:"Maximum\:%8.2lf %s\n" \
COMMENT:"Total Out\: 0 bytes\n"

RRDTool Says:

ERROR: opening '/var/www/cherokee/cacti/rra/router_bw_utilization_load_5min_11.rrd': No such file or directory

[Linegod]

http://docs.cacti.net/manual:087:4_help.2_debugging