you are now into it, when you click on your post.
Then you can add this folder, on the left side "add to favourites" or something like it.
Another way to it, is on the forum main page, there is "find more folders" in the top right where you find it on the first page(global folders)
PS: i saw your problem, and edited my first reply but not fast enough, i am quite sure the BB will take a look at it.