XML/PHP and flash

Hello all!
I had a question about XML/PHP and flash. Yesterday I read through the XML and PHP section in the kirupa website and was very pleased with the information that I found. I downloaded the simple_editor.fla and was trying to get it to run locally (w/o server access) but I keep getting an error and it says it cannot load my XML. Is this b/c I am running it from my computer with out a server?