This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
Post the relevant part of the config? Also what error you get? do you get an exception? How did you run the code at run-time (how are you passing the parameters?)
Without any info its difficult to guess what you problem could be!