Rafflecopter not working

I’m trying to put a Rafflecopter code on my self-hosted WordPress.org blog. When I add it in the text editor and switch back to visual, it only displays “a Rafflecopter giveaway” and not the whole widget. When I preview the page, even after refreshing twice, it simply won’t display. I followed the tips here: http://www.rafflecopter.com/questions/#wordpress, and that’s not working either. Help!
–notesfromanewlywed.com