I didnot upgrade the database, How do i upgrade the database tables
This is module dependent, but in general, if there are extensive changes, they include an SQL script that does the upgrade for you, which you just import in your admin tool such as phpMyAdmin.
If there aren't any "extra" SQL scripts, then you might have to delete your old table(s) via phpMyAdmin and recreate them. You might lose some private messages in the process though. Of course you can export each record and import them later on, but I am not sure how much effort you want to put into that.
Regards,
Kobus