Unable to graph Modems per Upstream :(

Greetings! I am receiving the following error when I attempt to create a Modems per Upstream graph within Cacti. I am trying to graph all of our Modems per Upstream so that I can use THOLD to alert in the event of a node outage. Has anyone been successful in accomplishing this? Can you please share your setup?

Cacti 0.8.8a
RRDTool 1.4.X
Cisco CMTS Host Template

Thank you!

RRDTool Command:
/usr/bin/rrdtool graph - \
--imgformat=PNG \
--start=-86400 \
--end=-300 \
--title='CMs |query_ifName| |query_ifAlias|' \
--rigid \
--base=1000 \
--height=120 \
--width=500 \
--alt-autoscale-max \
--lower-limit='0' \
--vertical-label='CABLEMODEMS' \
--slope-mode \
--font TITLE:10: \
--font AXIS:7: \
--font LEGEND:8: \
--font UNIT:7: \
AREA:#00CF00FF:"Registrered Modems" \
GPRINT::LAST:"Current\:%8.0lf" \
GPRINT::AVERAGE:"Average\:%8.0lf" \
GPRINT::MAX:"Maximum\:%8.0lf\n" \
LINE1:#002A97FF:"Active Modems\:" \
GPRINT::LAST:" Current\:%8.0lf" \
GPRINT::AVERAGE:"Average\:%8.0lf" \
GPRINT::MAX:"Maximum\:%8.0lf\n" \
LINE1:#ED7600FF:"Total Modems\:" \
GPRINT::LAST:" Current\:%8.0lf" \
GPRINT::AVERAGE:"Average\:%8.0lf" \
GPRINT::MAX:"Maximum\:%8.0lf"
RRDTool Says:
ERROR: parameter '#00CF00FF' does not represent a number in line AREA:#00CF00FF:Registrered Modems