If i setup my comments only for registred users, and i'm already loged in as registred user, i can't see the comment form, also as administrator, can someone help me?

Hi Mirko,

Have you enabled comments in category/item view options?
And comments form exists in the item.php template file?

at the option "Item view options" - i have set to show, it is true? The code in item.php is inside of this file, because if i allow comments to "everyone" then i see the form

Hello Mirko,

This sound more like a template issue. try browsing the page with a ?template=system or ?template=atomic suffix on your URLs to see if your comment form is visible when using the default templates.

Hi Krikor,

thanke you for your helping, i have doing this, i can't see the form, i have also tried to use default template and not my overrieded template, but it's the same problem, i use joomla 3.0, and have by Parameters i have set this "Global setting for comments->Enabled for registered users only", the user has standard user group, "registred" and he should can comment articles and at category settings comments->show, true?

Mirko, I created a new Joomla! 3.1 installation and it worked,
but you have to give permissions to specific categories in your K2 User groups settings.