Question [Topic closed by moderator - assumed resolved] crashed forum

Maybe I now sound like a noob, but can you tell me where I can do all that.
Because all the members are angry at me, and I'm not even the owner, but the owner isn't online much.
So I'm trying the best I can.

Upgrade procedures :

joomla! : docs.joomla.org/Upgrading_1.5_from_an_existing_1.5x_version
Kunena! : docs.kunena.com/index.php/Upgrade_Information_V1.5

How to repair a table with phpmyadmin : php.about.com/od/mysqladministration/qt/repair_mysql.htm , the table causing problems in your case is jos_fb_whoisonline

where can I find the phpmyadmin?
Because I just logged in by Joomla, where I can change things but I can't find the place where I can repair this thing

If you have access to your host control panel, you will have access to phpmyadmin.

This issue has nothing to do with Kunena -- site has had power failure or a server crash which corrupted one or more database files.

My best suggestion is to call to the service provider and ask them to repair or restore the table from backups (they usually do it for free, if it was not site owner who messed things up). While it's likely that the table can be repaired, there is a slight possibility that the data has been partly destroyed or the file cannot be repaired (without restoring it from the backups).

I hope that you get this issue fixed soon.