PLSM2 runtime exceptions

I've recently begun implementing PLSM2 into my Ogre based Game engine and i seem to get a runtime error when I load my resources to the effect of "resource with the name BaseWhiteNoLightNoDepthCheckWrite already exists" I looked for this in the media directory to no avail. Does anyone have any idea what is causing this? The same exception is also thrown by the demo application that comes with the PLSM2 binaries

check if do not have 2 color.materials file (one from an old plsm2 media copy)

Not sure what version of the source you're using etc., but check out my next to last post in this thread:
http://www.ogre3d.org/phpBB2addons/viewtopic.php?t=318

I think tuan fixed it in the CVS version, but some other versions might still have problems with duplicated material files.