help! no rrds no graphs

[sunmanhe]

d:/rrdtool/rrdtool.exe graph - \
--imgformat=PNG \
--start=-86400 \
--end=-300 \
--title="jzj8016 - Traffic - GigabitEthernet15/0/3" \
--rigid \
--base=1000 \
--height=120 \
--width=500 \
--alt-autoscale-max \
--lower-limit=0 \
--vertical-label="bits per second" \
--slope-mode \
DEF:a="D\:/www/cacti/rra/jzj8016_traffic_in_15.rrd":traffic_in:AVERAGE \
DEF:b="D\:/www/cacti/rra/jzj8016_traffic_in_15.rrd":traffic_out:AVERAGE \
CDEF:cdefa=a,8,* \
CDEF:cdefe=b,8,* \
AREA:cdefa#00CF00:"Inbound" \
GPRINT:cdefa:LAST:" Current\:%8.2lf %s" \
GPRINT:cdefa:AVERAGE:"Average\:%8.2lf %s" \
GPRINT:cdefa:MAX:"Maximum\:%8.2lf %s\n" \
LINE1:cdefe#002A97:"Outbound" \
GPRINT:cdefe:LAST:"Current\:%8.2lf %s" \
GPRINT:cdefe:AVERAGE:"Average\:%8.2lf %s" \
GPRINT:cdefe:MAX:"Maximum\:%8.2lf %s"
RRDTool Says:

ERROR: opening 'D:/www/cacti/rra/jzj8016_traffic_in_15.rrd': No such file or directory

[BSOD2600]

read http://forums.cacti.net/viewtopic.php?t=11747

read http://docs.cacti.net/node/283