What do you mean by "gone"? It's still there, it's just not on the front page. Either serch for it page-by-page or use the "search" feature and search for it by keyword. I use the search and get hits from back in 2000 all the time. If the topic is older than 90 days you need to do as ChefJoe suggested and search the "Archived Messages" as opposed to the "Current Messages". HTH.