Lyokofreak won't log me in.

I'll type in my stuff, and it'll bring me back to the forum, but I'm still logged out. I tried other forums, non of them phpbb. I think that might be the source of the problem, so I'll sign up for some phpbb forum afterwards. >_>
I then broke my self-promise and went back to IE, and, as you can see, that worked. Please, someone help me, I want to stay with FireFox, but not if it means losing... Lyokofreak.

And no one tell me to just switch between the two, for I am a busy man-- er, teenager.
Geekish as I am, I can't seem to resolve this problem. I will try screwing around with teh settings, but in the meantime, yeah...