Sebastian, well my question was that my forum isn't in a directory (per se, of course it is in a directory, just the web site's home one). In other words, my forum is the site, the site the forum ie:
http://domain.com
I solved it by removing:
$forumdir = "???"; // name of your forum directory
-and removing any mention of $forumdir anywhere.
Everything works now, and I'm sure members will really groove on it, DANKE!