Try squeezing the shrimp first so that the "shrimp juice" will be on your water column.... this will surely lure your SC to open up and then you can finally feed them meaty foods etc..
Hi Lemonlemon,
You've just purchased an Azoo coral.
This site might help you know the in's and out in rearing those delicate specimen.
http://www.ultimatereef.net/forums/forumdisplay.php?f=454