JoomSEF doesnt work when activating

When I try to activate JoomSEF on my website appear the following string:

No valid database connection Unknown column 'filters' in 'field list' SQL=SELECT `filters` FROM `jos_sefexts` WHERE `file` = 'com_content.xml' LIMIT 1

anybody has an idea what I could try to do?

thank you

Valeria

CAUSE

JoomSEF's database wasn't correctly updated during an update.

SOLUTION

The simplest solution is to uninstall JoomSEF and install it again. If that's not an option (when you don't want to lose your SEF URLs and configuration) use phpMyAdmin or similar database management tool and run the following SQL query:

ALTER TABLE `jos_sefexts` ADD COLUMN `filters` TEXT;