WordPress.org

I press key comb, but the Login box does not appear.

Try logout. Login-box doesn't work if you are already logged.

I'm ALREADY unlogged. Login-box just don't works...

Read steps 3 and 4 in the Installation section.

Can open/close the Login-box with a link?

Yes. Just use the link syntax:

<a href="http://www.myblog.com/wp-login.php" rel="loginbox-toggle">Make the box!</a>

I want to make a theme for the Login-box. Do you have a good tutorial?

No :(

But if you eat HTML and CSS in breakfast, see the files of the default Login-box themes. It's easy, I assure!

I have another question was not answered here, what can I do?

Maybe the best way is go to my blog (http://danillonunes.net/en/tag/login-box/) and send your question as a comment from one of the posts about Login-box. Alternatively, you could send me a private message (http://danillonunes.net/en/contact/).