Did you copy the dll and its .decls into the blitz's userlib directory?
Nope. Didn't know there was one.
Done it and now everything works properly. You should add a faq page to your docsa thing so that people know about this. I just tried installing it again and noticed that it does tell you to copy the files in the readme. However I never read the license agreements or text files in things like this (as I'm sure a lot of others don't) so completely missed it. Now I have had a look it appears to be working fine.
I now need to read and understand what is going on since, as I said in my first post, this looks really interesting, and could be good for my future games.