Why does this forum not recognise my user name ...

... when I attempt to log in here (which is why I'm posting as a guest), whereas the rest of the site does?

The site and the forum use different systems. You have to register again on the forum if you want to be a registered user here too. This is because the forum uses free software that I downloaded from the internet, while the site I coded myself.

Right now, I don't know how to solve this- sorry.