The best elegance coral study in the aquarium industry was done by Eric Borneman. The study lasted from 2004-2007. He concluded that pathogen was responsible for poor survival rate of elegance corals in that period, especially those from Indonesia.
What's the shape of the base of your elegance coral? Is it cone shape (most likely from Indonesia) or wall shape (most likely from Australia)?
The study is here:
http://reefkeeping.com/issues/2008-01/eb/index.php