My epidendrum radicans seems to like a fair amount of water and gets fungal problems easily. They should be easy to grow, the ones I have had have been survivors. Is it over potted? They don't need much pot around them as far as I can tell. Mine have always grown new stems and keikis like mad and become a rather untidy plant in a happy way. I haven't had many of them, so hopefully someone more experienced will chime in with good ideas.