You click on the blue star on the forum page (theb one with all tey threads), and up comes the first 50 posts, but upmthe top there is a (1) and a (2) and so forth - and when you click on each one, up come the appropriate set of 50 posts.

If it doesn't work, there's some problem to take up on the Help page (click the Help button atbteh topright of the page.