Not able write posts and edit older ones after update from b2

I used b2. I updated into WordPress 1.2.2. I import all my posts and comments and so on from b2. I modified index.php successfully (I see all my posts and I am able to put in a comments).
In wp-edit.php I can modify selected posta€?s category but I cana€?t change content of posts. If I choose Write (post.php), write a post and click on Publish button, the post is not saved. Database table wpposts dona€?t enlarge (there is no new row). When I click Advanced Editing button I see last post (not edited).