Where are you getting the DB from? That error indicates the one you have is rather old as the items table hasn't changed in some time... You can either grab a semi-current DB from the installer:
http://www.projecteq.net/phpBB2/viewtopic.php?t=4346 updates are here:
http://www.projecteq.net/phpBB2/viewtopic.php?t=4612
Or, if you feel like fiddling with CVS (not hard at all, and there are tons of tutorials about) this is where you'll always find our current DB:
http://www.projecteq.net/phpBB2/viewtopic.php?t=2258