The file that came from blender itself is okay? or...
Wich version of Blender do you use?
Current version is 2.56. I think Blender is rewriting the entire sourcecode, meaning there py scripts should be updated too (will follow0. The implementation of their py API isn't finished yet (at least with my version wich is a few month old).
Meaning you call a script with no functioning implementation, pretty lame
Try all formats until you get one. If it doesn't work try an older blender version.
No

I am no noob, just checking if your not one too
Thanks to Niko and all others that made Irrlicht possible.