Data Input script issue

Hello,

I'm running cacti Version 0.8.8a.

I created a script with three data points, added the data input method, added the data template and then added the data source to the proper host. I created the graph and everything is working, no errors in the log, but one of my data sources is showing 0 when it should actually be reporting some non-zero number. 

I've checked and double checked that the output is <source>:<data> and that it all matches up. Does anyone have an idea what I can look at to hunt down this issue? 

Thanks,
mjr

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