achsanos on "A comment box for index page (the page, no the posts inside the loop)"

I want to place a custom comment box on index.php, and I did it inserting a call to the comments_template:

$withcomments = 1;
comments_template();

However, the comment box is getting the id of the last post called in the loop, redirecting to it page after done a comment. I need a comment box for the index.php, not for posts (and no redirections). Is there something wrong?