"View First Unread" is not working

my view first unread thread is not working...when i click it, it goes to the first post even though i have read it already...it does this with every post.

vbseo was the last big plug-in i installed. :(

Are you using the database to track read post marking? If you are using vBulletin's old cookie method, you need to edit your vbseo_config file and change this option to a 1, as shown here:

Code:

define('VBSEO_NEW_LAST_POST_COOKIE',1);