like i already said (others too)...some rooms are designed for starting a thread without replies...like the want ads room for those in need to post their addy so providers can contact them OFF of the boards, which is the idea behind not allowing replies in those rooms as it is not open for discussion here in public.
now if you would just post a link to the room where this problem is giving you fits i could verify it for you...otherwise you'll just have to settle with, "the boards are working as they have been designed to work".