Cut-off problem with scrolling text

hi there
i’ve got a really weird problem - am making a scrolling text box as part of a site and it’s all working fine - i actually ripped off the whole workings from another scroller i made. the problem is that when i publish, about half of the text is missing. just blank space. it’s all there in the .fla and i’ve made scrollers with a hell of a lot more content than that in the past, so i don’t have a clue what the problem could be! any ideas?
thanks -
emma.