If I knew more about the problem, I would tell you :P
I have double-checked account details, and that isn't the problem, and I installed the language pack on the jRFO registration guide (
http://rfbase.com/modules/news/article.php?storyid=45)
I did not restart my computer, though, so that could be it, maybe?
I also did not change my regional settings, because-- well, because I am an idiot :P
If any of ya'll think I installed the wrong language pack, and could show me where to get the correct one, I would really appreciate it.