not getting graph

[er_jstoor]

hi,

i m not getting the graphs in cacti. i m getting following error

=========
RRDTool Command:

c:/cacti/rrdtool.exe graph - \
--imgformat=PNG \
--start=-86400 \
--end=-300 \
--title="windows - Processes" \
--base=1000 \
--height=120 \
--width=500 \
--alt-autoscale-max \
--lower-limit=0 \
--vertical-label="processes" \
--slope-mode \
--font TITLE:12: \
--font AXIS:8: \
--font LEGEND:10: \
--font UNIT:8: \
DEF:a="C\:/cacti/rra/windows_proc_14.rrd":proc:AVERAGE \
AREA:a#F51D30FF:"Running Processes" \
GPRINT:a:LAST:"Current\:%8.0lf" \
GPRINT:a:AVERAGE:"Average\:%8.0lf" \
GPRINT:a:MAX:"Maximum\:%8.0lf"
RRDTool Says:

ERROR: opening 'C:/cacti/rra/windows_proc_14.rrd': No such file or directory
========

can some body help

[gandalf]

In most cases, this is due to downed host detection. Find some hints at the 2nd link of my sig
Reinhard