Enabling Comments/WordPress 3.1

To enable comments on your individual pages in WordPress 3.1 you need to sign in to your WordPress Dashboard. At the top of the top of the page click the box called ‘screen options.’
Tick ‘Comments’ and ‘Discussion.’

When you are editing your pages, below the textarea where you write the page there should be a discussion box with check boxes for comments and pingbacks. Make sure at least the comments are checked.
You can also enable the comments for a group of pages by going to the main ‘Pages’ list and selecting at least one page. Then at the top of or bottom of the page list click: Bulk Actions > Edit > Apply.
Then you can enable comments or disable them if you want to.

Troubleshooting:
If your comments still won’t come on make sure that you haven’t checked for your comments to automatically close after a certain amount of days under Settings > Discussion in your WordPress.

Your Comments table in your database may need repair. If you have control over your databases and cPanel you can repair your database by going to phpAdmin under Databases (this is on the first page after login). Select the database WordPress is using (if you don’t know go to your wordpress folder in the file manager and look at the wp-config.php). Find the comments table in WordPress’ database. It will have a prefix then comments. Something like this wp_comments. Click browse (it is usually indicated by an icon in its column). Then near the top of the screen will be ‘operations.’ After you click that a repair button is near the bottom of the page.
Hopefully that will fix the table and you will have comments.