comment_ID 0

Hi, i have a strange problem. I cant do any comments anymore. If i´m cleaning the wp_comment database and run it from scratch, so that is any post in it, i can make one comment, and that will be comment_ID 1, but next post i do will have comment_ID 0, and then it will broke the hole comemnt system.
What should i do?

[This is a second comment, i get this debug MSG]
WordPress database error: [Duplicate entry ‘0’ for key 1]
INSERT INTO wp_comments (comment_post_ID, comment_author, comment_author_email, comment_author_url, comment_author_IP, comment_date, comment_date_gmt, comment_content, comment_approved, comment_agent, comment_type, comment_parent, user_id) VALUES (‘358’, ‘Jonas XXX’, ‘jonas@XXXX’, ‘http://www.XXX.org’, ‘213.226.107.131’, ‘2007-01-28 12:13:36’, ‘2007-01-28 11:13:36’, ‘test2’, ‘1’, ‘Mozilla/5.0 (Windows; U; Windows NT 5.1; sv-SE; rv:1.8.1.1) Gecko/20061204 Firefox/2.0.0.1’, ”, ‘0’, ‘1’)

WordPress database error: [You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ” at line 1]
SELECT * FROM wp_comments WHERE comment_ID =