It could be something else installed on your system that is conflicting with the Prometheus files.
If it's not too much trouble, perhaps a good way to solve this problem would be to reinstall the entire OS and start from scratch, but this time, install the Prometheus drivers and Picasso 96 software before any other stuff, like patches, etc., and work your way up from there.
I'd wait first for some other (better) advices before trying out mine, though. :-)
