Welcome to Spark Plug wiki.
Spark Plug is welcome to any contribution, bug reports or any ideas for improvement. Please do not hesitate to ask for help.
For step by step guide on how to properly use this plug-in, please read The Simple Guide. Please pardon my writing.
For support requests and bug reports create an issue in http://github.com/jedt/spark_plug/issues and hopefully someone will help you there. The original author is inactive at this time.
But you can visit http://bodegasale.com/jed/?p=231 for previous support/discussions.