Q: I have installed all, but it ask me for a login/password now
A: Login as admin/admin (then you can create a new group, an user_admin for this new group, then logout and re-login as this admin and configure your new forum : DO NOT USE the default group for normal operations).
Q: What is mod_perl ? Is it absolutly necessary ?
A: mod_perl is a perl accelerator. It not need, but highttly recommended for a server with a lot of connections.
Q: Agora tell me there is x new messages, but I found only x-n new ?
A: A user has removed its message.