I have 2 Copperbands, both eating well, including dry food. Here is how I got mine to eat.
http://www.canreef.com/vbulletin/showthread.php?t=73021
I have now moved the larger one on the right to my big display tank. He now has to deal with other more aggressive tank mates at feeding time. So to make sure he gets enough, I use a turkey baster to get it right in front of him, so he can grab it before it gets gobbled up by other fish.