Glad you got it going. Also, to answer your previous question:
"The string between the pipe and the equal sign must precisely match the name of the DataPoint you are trying to graph. This was the reason my RRD file was not being created. I assume this means the RRD files are not created until the first data value is retrieved?"
Yes, that is correct. Furthermore, you need a couple of data collection cycles before the RRD file will have enough data to graph. If you're impatient like I am, you can run `rrdtool dump blahblah.rrd | less` and see if anything was added right after the file is updated.